governmental behavior in representative democracy a synthesis of the theoretical literature what is the impact of bureaucratic behaviors on tax rates what is preferable a bureaucrat or a partisan politician does a flypaper effect occur when lobby groups influence public policies this article tries to answer these questions by analyzing and comparing six different models of public choice 1 the median voter model 2 the leviathan model 3 the slack maximizing model 4 a general model of bureaucracy 5 the partisan politicians model and 6 a general model of lobbying among several results it is shown that the median voter s income and tax share almost always play a significant role in the design of the public good tax package even if the government does not explicitly try to maximize the median voter s utility the article also provides a synthesis of the positive analysis of the flypaper effect

decoupling of industrial energy consumption and co2 emissions in energy intensive industries in scandinavia as methodology the ex post analysis deserves more attention as a device to calibrate energy sector models this paper studies the impact of energy prices and taxes on energy efficiency and carbon emissions of ten industrial sectors in the three scandinavian countries a database with sector specific energy prices and taxes has been established which allows the analysis to take various price reductions and tax exemptions better into account a translog factor demand system estimation for a cross industry pooled model is explored and fixed effects across industries and time is estimated the findings here confirm recent analyses which indicate higher long term elasicities for industries than normally assumed in scandinavian energy sector models with the observations on differences in energy intensities among sectors and countries the findings allow for some optimism as to the opportunities for further decoupling between trends in gross value added carbon emissions and energy consumption

an econometric analysis of u s foreign direct investment this paper constructs a theoretical model of foreign direct investment and examines the extent to which the model can explain the level of outward direct investment by u s companies over the last two decades the authors find that market size and factor costs both labor and capital are important factors in the investment decision instrumental variable estimation is used to demonstrate that the expectation of short run fluctuations in the dollar also influences the timing of investment copyright 1996 by mit press

co benefit of carbon mitigation on resource use in china abstract on one hand natural resources and energy provide the basis for life on earth but waste and emissions are produced during their throughput on the other hand china as the most populous country and an emerging economic powerhouse has taken on the challenge of hitting peak carbon dioxide co2 emissions by 2030 pursuing resource co benefits from carbon mitigation is an effective approach for china on the road to achieving the 2030 goal in this study we combine the computable general equilibrium cge model and the economy wide material flow accounts or analysis ew mfa method to estimate china s future co2 emissions and resource consumption and their co benefit effect three scenarios are analyzed business as usual bau nationally determined contributions ndc and the scenario of achieving the 2 degree target 2deg we find that both the ndc and 2deg targets can be achieved by 2030 without a significant compromise in economic growth with the effect of carbon mitigation china s resource consumption would rise by a factor of 1 7 bau 1 6 ndc and 1 5 2deg during 2012 2030 and the reduction in co benefits of metal ores nonmetallic minerals and fossil fuels would be 0 6 billion tons and 1 4 billion tons 0 8 billion tons and 2 0 billion tons and 2 6 billion tons and 4 6 billion tons for ndc and 2deg respectively sectoral disparity indicates that sectors with high emissions and resource consumption include traditional heavy industrial sectors and energy related sectors for which additional mitigation policies should be employed not only because they offer the most co benefit effects but they also have the least cost

voter preferences and state regulation of smoking i introduction tobacco taxation and smoking restrictions are two areas of regulation for which states have maintained a high level of control relative to the federal government 1 given this flexibility states have established a wide range of restrictions on smoking in areas such as government workplaces restaurants bars shopping malls indoor arenas and hospitals 2 although most states restrict smoking in hospitals there is considerable variation among states in restrictions in other areas in the 1998 99 period of this study about two thirds of states restricted smoking in restaurants whereas only four states restricted smoking in bars what has led to variation in smoking restrictions across states in a democratic society one would expect voter preferences to play an instrumental role in determining which policies are enacted and which are not this article provides the first empirical exploration of whether state level smoking restrictions are consistent with preferences of the citizenry taking into account both voting behavior and the role of smoking status in influencing whether an individual votes specifically we examine whether voters preferences for smoking restrictions in restaurants bars malls indoor sporting events and hospitals are consistent with state level restrictions on smoking in each of these public areas 3 our research draws on public choice models of policy making by state and local governments voters preferences typically play a central role because voting affects legislators incentives to support regulations 4 public choice research also finds that nonvoter factors may influence state and local policy making 5 in the case of smoking regulations public health advocates or tobacco industry lobbyists might influence regulatory policies the specific building block of our analysis of state restrictions on smoking is information on individuals voting behavior which we link to their smoking status and preferences over smoking restrictions our analysis uses measures of political pressure that account for individual preferences as well as their voting behavior to examine the possible role of interest group pressures we also control for nonvoter influences on smoking regulation including the proportion of the state population who smoke measures of state ideology and size of the tobacco industry with the exception of smoking in bars there is majority support for smoking restrictions unsurprisingly smokers are less supportive of restrictions than are nonsmokers nonetheless even smokers demonstrate a high level of support for many restrictions smokers are also less likely to vote than are nonsmokers even after controlling for other demographic factors the lower voting rate diminishes voter opposition to antismoking regulation but is usually not critical in view of the substantial support that most smoking restrictions have among smokers the political pressure indices for restrictions on smoking in each public area are generally significantly related to the probability that a state restricts smoking in that public area the nonvoter factors such as the smoking rate in the state and tobacco s role in the state economy are rarely influential policy debates over the desirability of smoking restrictions emphasize possible health risks due to exposure to environmental tobacco smoke ets and effects on business profitability the primary argument for expanding smoking restrictions is to protect workers and customers from exposure to ets 6 as our results show voters are generally supportive of smoking restrictions in public areas which would thereby protect workers as well as themselves and other customers however there is a substantial controversy over the extent of health risks associated with exposure to ets the basis for the push by the u s occupational and safety health administration osha for increased smoking restrictions to protect workers is the highly controversial u

the evolution of chinese industrial co2 emissions 2000 2050 a review and meta analysis of historical drivers projections and policy goals the emissions of the chinese industrial sector alone comprise 24 1 of global emissions 7 8 gtcyr 1 in 2015 this makes chinese industrial emissions of unique national and international relevance in climate policy this study reports a literature survey that quantitatively describes the evolution of these emissions from 2000 to 2050 in the context of policy goals the survey reveals that 1 the major historical factor contributing to the decrease in industrial co2 emissions has been the reduction in energy intensities however that decrease has been more than compensated for by increases in industrial activity 2 an ensemble of projections shows that china s industrial emissions will likely peak in 2030 in alignment with china s commitment to the paris agreement the timing of the peak varies across industrial sub sectors with ferrous metals and non metallic products sectors peaking first and the electricity sector later 3 the assumptions underlying optimistic scenarios broadly match the drivers of recent decreases in historical emissions energy intensity industrial structure and energy mix furthermore these factors feature prominently in china s policy portfolio to both develop and decarbonize the chinese industrial sector the industrial carbon intensity targets of 2020 and 2025 are close to the median predictions in the medium scenarios from studies 2019 the authors

causes of japanese firms direct investments in us manufacturing industries a composite model is developed to investigate the determinants of new japanese direct foreign investments in the us the time period of study is 1976 to 1990 observing 11 types of us manufacturing industries an autoregressive model is employed in the empirical estimation process using a set of panel data it is found that the higher japanese gross savings and lower after tax industry profit rates cause a larger amount of japanese direct investment an expected depreciation of the real exchange rate and or low exchange rate induced a larger amount of direct investment larger economies of scale at the corporate level such as a higher r d intensity as well as higher non trade barriers stimulate a larger amount of direct investment cultural distance did disadvantage japanese fdi in the us

the locational determinants of direct investments among industrialized countries abstract market size and growth rate as well as tariff barriers have already been shown to influence u s direct investments in the eec the present paper enlarges the field of observation to all bilateral flows of direct investments among six industrialized countries the united states germany france the united kingdom the netherlands and belgium over the years 1969 1982 it also tests the impact of two other would be locational determinants of foreign direct investments namely unit labour costs and export flows moreover a new and alternative specification is put forward and tested which assumes that in the investment decision process foreign locations are in competition not only with each other but also with the home country of the investor

exchange rate exchange rate volatility and foreign direct investment in the light of the importance of foreign direct investment fdi for the promotion of economic development this paper examines the impact of the changes in the real exchange rate and its volatility on fdi examining japan s fdi by industries we found that the depreciation of the currency of the host country attracted fdi while the high volatility of the exchange rate discouraged fdi our results suggest the need to avoid over valuation of the exchange rate and to maintain stable but flexible exchange rate in order to attract fdi

decoupling economic growth from carbon dioxide emissions in china a sectoral factor decomposition analysis china is facing the dilemma of how to coordinate economic development and carbon dioxide co2 emissions reduction this paper investigates the decoupling effect of economic growth from co2 emissions in china during the period 1992 2012 using the logarithmic mean divisia index lmdi method we decompose the driving forces of the decoupling of economic growth from co2 emissions in china s five major economic sectors into several factors and measure the contribution of each factor to the decoupling of china s overall economy from co2 emissions the results show that china performed the weak decoupling of economic growth from co2 emissions during 1992 2012 and so did all its five major sectors such a state did not occur smoothly and presented five different stages energy intensity and economic activity level were the most important factors affecting the decoupling in china energy intensity decreased in all sectors indicating a large acceleration for the sectoral decoupling states this finding is applicable to process carbon intensity in industrial sector and energy emission factor in agricultural industrial construction and service sectors in terms of sectoral effects on the decoupling in china industrial sector played a dominant role while construction sector had the most marginal influence the economic activity level and economic share of industrial sector exerted the most negative effects on the decoupling the energy intensity of industrial sector played a key role in promoting the national decoupling state while the energy emission factor of agricultural sector contributed the least

human capital and fdi inflows to developing countries new empirical evidence abstract despite the dramatic increase in total foreign direct investment fdi flows to developing countries in the last few years the bulk of the inflows has been directed to only a limited number of countries it has been argued that developing countries might enhance their attractiveness as locations for fdi by pursuing policies that raise the level of local skills and build up human resource capabilities nevertheless the empirical evidence in the literature in support of this recommendation for a large sample of developing countries is scant this paper evaluates this argument in the light of the evolution in the structural characteristics of fdi and empirically tests the hypothesis that the level of human capital in host countries may affect the geographical distribution of fdi the empirical findings are a human capital is a statistically significant determinant of fdi inflows b human capital is one of the most important determinants and c its importance has become increasingly greater through time

in search of substitution between foreign production and exports abstract are foreign production and exports substitutes or complements standard theory of the multinational corporation mnc assumes substitution while previous empirical work examining the relationship has generally found strong evidence of complementarity this study examines product level data which more closely fits the assumption of a single product firm often used in mnc theory and finds substantial evidence for both a substitution and a complementarity effect between affiliate production and exports with japanese automobile parts for the us market i also test for and find evidence of substitution using product level data on a set of japanese produced final consumer goods

supply side structural effect on carbon emissions in china abstract this paper carries out a structural decomposition analysis sda of production related carbon emissions in china from 1992 to 2005 by adopting the ghosh input output model it finds that the supply side structure measured by sectoral shares in value added increased production related carbon emissions in 1992 2002 mainly due to the rapid growth of manufacturing sectors but reduced them in 2002 2005 thanks to the decreased shares of carbon intensive sectors whatever the supply side structure forward carbon multipliers of each sector or changes in supply side sectoral shares and related emissions effects calculated by adopting the ghosh input output model were different from their demand side counterparts estimated by adopting the leontief input output model the results suggest optimizing the supply side structure and lowering the forward carbon multipliers to control carbon emissions in the future

is carbon emission growth decoupled from economic growth in emerging countries new insights from labor and investment effects abstract as emerging countries are both major contributors to global carbon emissions growth and global economic growth the sharp contradiction between economy and carbon emissions has seriously hindered the sustainable development of emerging countries and is not conducive to the realization of global emission reduction targets this work takes brics brazil russia india china and south africa the representatives of emerging countries as an example to investigate the decoupling state between economic growth and carbon emissions and to uncover the driving factors behind these decoupling the results show i russia and south africa have experienced the longest time of strong decoupling indicating that the decoupling in these two countries is better than that in other countries china india and south africa was characterized by expansive coupling weak decoupling and expansive negative decoupling respectively ii the labor effect and investment effect have contributed to the carbon emissions growth in the brics and the reasons for the carbon emissions changes in russia india china and south africa are strongly consistent while brazil has a different performance iii the investment decoupling effect has hindered the decoupling process in russia south africa china and india but has promoted the decoupling process in brazil while the energy intensity effect is the driving force in the decoupling process in most countries finally the policy recommendations for the different decoupling status of each country were put forward

the growth of social security electoral push or political pull the growth of social security electoral push or political pull i introduction during the post world war ii period the social security program was among the fastest growing programs in the federal budget surpassing defense spending as the largest category of expenditures in the mid seventies the program which disbursed only 132 million dollars in 1942 disbursed more than 156 billion dollars forty years late a thousand fold increase as a consequence of this growth and the program s recent financial problems a number of economists have turned their attention to the economics of social security recent examples include kahn 1988 boskin et al 1987 and veall 1986 yet only weaver 1982 and turner 1984 attempt to analyze the growth of the social security program weaver s legislative history of the program suggests that special interest groups had a major impact on social security programs turner argues that program benefit levels are affected by demographic changes which affect the cost of intergenerational redistribution in this paper we use the public choice approach to explain increases in benefit levels from 1946 1980 we develop and test three alternative public choice models of the politics of retirement benefit levels our analysis thus sheds light on an important question neglected by previous research have social security expenditures grown because special interest groups have effectively captured the congress or is congress simply responding to demands placed on it by the electorate the answer to this question is relevant to normative analysis of existing programs and to alternative proposals for reform in addition our study of the principal determinants of the growth of program benefit levels serves as an event study for assessing the merits of alternative theories of political decision making borcherding 1985 discusses two public choice explanations for the growth of public expenditures first public programs may expand as a result of the voting rules which underlie the political process when decisions are made by majority rule an increase in the median voter s demand for public services tends to increase public service levels because prospective candidates will revise their policy positions in order to be elected the wagner 1958 hypothesis for example maintains that increases in real income cause individuals to prefer both absolutely and relatively larger public expenditures borcherding notes that about 40 percent of the rate at which public sector spending has replaced private sector spending over the past eighty years can be explained with a median voter approach such an approach does better in what borcherding calls traditional areas of public expenditure where a median voter model can account for about 73 percent of the rate at which public expenditures excluding transfers have displaced private expenditures the median voter might favor public transfers to the elderly for two reasons first he may have an interdependent utility function in which the plight of the elderly poor arouses a charitable response while the redistribution from young to old does not simply target the old poor as a group the elderly do seem to be relatively less wealthy than the middle aged and the yound if one considers the average capitalized value of future income receipts from labor and capital second to the extent that the social security program offers a connection between reductions in current consumption and increases in future consumption it is a rather complex savings and insurance program the median voter s motivation for transferring monies to today s elderly may be a vehicle for ensuring future transfers to himself while this explanation is difficult to motivate at the individual level since a savings program for future retirement need not pay anything to today s elderly a continuing program of tax funded transfers is plausible method of establishing the moral constitution necessary to ensure that future transfers do in fact take place

trade restraints and japanese direct investment flows abstract this paper analyses the factors determining the scale and location of japanese foreign direct investment fdi over the 1980s we use a pooled cross section time series annual data set covering investment in the individual ec countries and the united states our results suggest that controlling for market size and relative labour costs investment was significantly influenced by trade protection measures and in particular by the level of anti dumping actions initiated in the last decade an additional effect from the cost of finance in japan is found suggesting that the tightening of monetary policy in japan in 1989 90 contributed significantly to the observed slowdown in fdi in the early 1990s

foreign direct investment and factor demand elasticities abstract this paper argues that the liberalisation of foreign direct investment fdi has made labour costs more important to domestic investment and long run labour demand it provides evidence from british and german data that is consistent with this view first high unit labour costs increase fdi outflows and lower fdi inflows second the effect of unit labour costs on domestic manufacturing investment was more negative in the high fdi 1980s than in the low fdi 1970s and this change was concentrated in high fdi industries the estimates suggest that the long run labour demand elasticity may have risen substantially

foreign direct investment exchange rate variability and demand uncertainty variable real exchange rates influence the location of production facilities chosen by a multinational with risk averse investors and fixed productive factors parent companies should not be indifferent to production location even with identical expected costs of production across countries if a nonnegative correlation exists between export demand and exchange rate shocks the multinational optimally locates some productive capacity abroad the capacity share abroad increases as exchange rate volatility rises and becomes more correlated with export demand shocks these results are confirmed using quarterly u s bilateral foreign direct investment flows with canada japan and the united kingdom copyright 1995 by economics department of the university of pennsylvania and the osaka university institute of social and economic research association

international taxation and multinational firm location decisions using a large international firm level data set we examine the separate effects of host and additional parent country taxation on the location decisions of multinational firms both types of taxation are estimated to have a negative impact on the location of new foreign subsidiaries the impact of parent country taxation is estimated to be sizeable consistent with its international discriminatory nature our results show that international double taxation by the parent country despite the general possibility of deferral of taxation until income repatriation is instrumental in shaping the structure of multinational enterprise

toward to economic growth without emission growth the role of urbanization and industrialization in china and india abstract the contradiction between economic growth and carbon emissions in china and india is the most prominent in the world both countries have faced tremendous pressures to curb carbon emissions because they are major source of new added emission sources meanwhile both countries have faced greater pressures to achieve industrialization and urbanization in order to eradicate poverty better understanding the decoupling status and its drivers can serve to develop effective policy to achieve economic growth without an increase in emission this paper comparatively analyses the decoupling effect of the economic growth from the carbon emissions as well as its drivers during the period 1980 2014 in china and india the tapio decoupling model was used to analyze the decoupling status and the co integration theory and the impulse response functions were applied to investigate the effects of urbanization industrialization per capita gdp and carbon emission intensity to decoupling the results show that china mainly performed a weak decoupling of economic growth from carbon emissions in 1980 2014 while the decoupling status of india was no regular in china carbon emission intensity is the biggest contributor of decoupling followed by urbanization per capita gdp and industrialization in india the biggest driver of decoupling is also the carbon emission intensity followed by urbanization industrialization and per capita gdp therefore improving energy efficiency is the best policy to toward economic growth without emission growth in china and india

decomposition of co2 emissions change from energy consumption in brazil challenges and policy implications this study evaluates the changes in co2 emissions from energy consumption in brazil for the period 1970 2009 emissions are decomposed into production and consumption activities allowing computing the full set of energy sources consumed in the country this study aims to develop a comprehensive and updated picture of the underlying determinants of emissions change from energy consumption in brazil along the last four decades including for the first time the recently released data for 2009 results demonstrate that economic activity and demographic pressure are the leading forces explaining emission increase on the other hand carbon intensity reductions and diversification of energy mix towards cleaner sources are the main factors contributing to emission mitigation which are also the driving factors responsible for the observed decoupling between co2 emissions and economic growth after 2004 the cyclical patterns of energy intensity and economy structure are associated to both increments and mitigation on total emission change depending on the interval the evidences demonstrate that brazilian efforts to reduce emissions are concentrated on energy mix diversification and carbon intensity control while technology intensive alternatives like energy intensity has not demonstrated relevant progress residential sector displays a marginal weight in the total emission change

foreign direct investment in the united states an analysis by country of origin given the large size and rapid growth of foreign direct investment in the united states this subject is a central concern of u s firms and u s government policymakers this study explores the factors that contribute to the explanation of fdi in the united states by country of origin of investment evidence from the past twelve years shows that the main significant positive influences are home country s exports to the united states and home country market size significant negative influences include the home country s imports from the united states the cultural and geographic distances of the home country from the united states and the exchange rate fx

comparing structural decomposition analysis and index to analyze and understand historical changes in economic environmental employment or other socio economic indicators it is useful to assess the driving forces or determinants that underlie these changes two techniques for decomposing indicator changes at the sector level are structural decomposition analysis sda and index decomposition analysis ida for example sda and ida have been used to analyze changes in indicators such as energy use co2 emissions labor demand and value added the changes in these variables are decomposed into determinants such as technological demand and structural effects sda uses information from input output tables while ida uses aggregate data at the sector level the two methods have developed quite independently which has resulted in each method being characterized by specific unique techniques and approaches this paper has three aims first the similarities and differences between the two approaches are summarized second the possibility of transferring specific techniques and indices is explored finally a numerical example is used to illustrate differences between the two approaches

using an extended lmdi model to explore techno economic drivers of energy related industrial co2 emission changes a case study for shanghai china although investment and r d activities can exert significant effects on energy related industrial co2 emissions eice related factors have not been fairly uncovered in the existing index decomposition studies this paper extends the previous logarithmic mean divisia index lmdi decomposition model by introducing three novel factors r d intensity investment intensity and r d efficiency the extended model not only considers the conventional drivers of eice but also reflects the microeconomic effects of investment and r d behaviors on eice furthermore taking shanghai as an example which is the economic center and leading co2 emitter in china we use the extended model to decompose and explain eice changes also we incorporate renewable energy sources into the proposed model to carry out an alternative decomposition analysis at shanghai s entire industrial level the results show that among conventional macroeconomic factors expanding output scale is mainly responsible for the increase in eice and industrial structure adjustment is the most significant factor in mitigating eice regardless of renewable energy sources the emission reduction effect of energy intensity focused on by the chinese government is less than the expected due to the rebound effect but the introduction of renewable energy sources intensifies its mitigating effect partly resulting from the transmission from the abating effect of industrial structure adjustment the effect of energy structure is the weakest although all the three novel factors exert significant effects on eice they are more sensitive to policy interventions than conventional factors r d intensity presents an obvious mitigating effect while investment intensity and r d efficiency display an overall promotion effect with some volatility the introduction of renewable energy sources intensifies the promotion effect of r d efficiency as a result of the green paradox effect finally we propose that co2 mitigation efforts should be made by considering both macroeconomic and microeconomic factors in order to achieve a desirable emission reduction effect

source country characteristics and the inflow of foreign direct investment into saudi arabia the paper examines the impact of source country characteristics on the inflow of fdi into saudi arabia using a gravity type model including economic distance and socio political variables a unique database listing all new investments involving foreign ownership is used to construct a panel of 33 countries in the period 1980 2005 to account for many country year observations with zero fdi the negative binomial regression the tobit regression and the heckman selection procedure are used the conclusions drawn from the analysis employing panel based techniques differ from the results obtained from pooled regression models also the determinants of fdi differ depending on whether foreign investment is measured in terms of investment expenditure or the number of individual foreign projects the heckman selection results reveal that there are a large number of factors affecting the decision to invest in saudi arabia compared with relatively few determinants of the actual size of investment traditional size and distance characteristics hold to a great extent but the relationship between fdi and bilateral trade is unclear and there is some evidence that the countries that export to saudi arabia do not invest there in terms of scope for possible spillovers there is mixed evidence on whether the investment comes from more technologically advanced economies but volume wise important investments originate from countries characterised by high income per capita

the lmdi approach to decomposition analysis a practical guide in a recent study ang energy policy 32 2004 compared various index decomposition analysis methods and concluded that the logarithmic mean divisia index method is the preferred method since the literature on the method tends to be either too technical or specific for most potential users this paper provides a practical guide that includes the general formulation process summary tables for easy reference and examples

political equilibrium and the provision of public goods this paper treats interest groups peoplein their role as consumers of a public goodand people in their role as taxpayers asthe unit of account for representativevoting each group is allowed to make aneffort to support its preferred candidateand at the margin the effort benefitratio is the political price the group iswilling to pay to secure an additionaldollar of benefits

reappraising the eclectic paradigm in an age of alliance capitalism this article discusses the implications of the advent of alliance capitalism for our theorizing about the determinants of mne activity in particular it argues that due to the increasing porosity of the boundaries of firms countries and markets the eclectic or oli paradigm of international production needs to consider more explicitly the competitive advantages arising from the way firms organize their inter firm transactions the growing interdependencies of many intermediate product markets and the widening of the portfolio of the assets of districts regions and countries to embrace the external economies of interdependent activities

the political economy of unfunded public pension liabilities this paper applies a public choice approach to the problem of unfunded pension liabilities and adopts the methodology of congleton and shughart 1990 to model underfunding of state level public pension plans using the median voter theorem along with the theory of capture by special interest groups and a combined model of the two with panel data from 2001 to 2009 the paper finds that the combined model provides the strongest explanation for the current levels of unfunded liabilities hence both median voter preferences and special interest group influence are affecting political outcomes the special interest group model slightly outperforms the median voter model in direct comparisons

analysis of electricity consumption in china 1990 2016 using index decomposition and decoupling approach abstract electricity consumption accounts for a significant portion of final energy consumption in countries worldwide and has a close relationship with economic growth this paper explores the factors influencing electricity consumption in china during 1990 2016 using index decomposition analysis and analyses the decoupling status between economic growth and electricity consumption in addition to the influencing factors these analyses are conducted at both national and sectoral levels the results reveal that 1 the economic activity effect was the main driving force increasing total electricity consumption in china while the energy intensity effect hindered it 2 both diversity and aggregation existed at the sector level the power generation chemicals and non ferrous sectors were the top three contributors to increased electricity consumption 3 the change of electricity consumption caused by gdp growth in china showed three decoupling states during 1990 2016 expansive negative decoupling expansive coupling and weak decoupling in particular the energy intensity effect stimulated the occurrence of decoupling 4 industrial sectors played a significant role in decoupling in china while service sectoral electricity consumption showed expansive coupling with its sectoral gdp in recent years

decoupling analysis and environmental kuznets curve modelling of provincial level co2 emissions and economic growth in china a case study abstract guangdong is one of the most representative provinces of china in terms of reflecting how the provincial level co2 emissions dynamically evolve with economic development during the process of industrialisation and urbanisation the present study combines decoupling analysis with environmental kuznets curve ekc modelling to systematically explore the interactions between co2 emissions and economic growth in guangdong from the short to long terms aiming to provide the referential significance of low carbon development to other chinese provinces empirical results indicate that co2 economy interactions in guangdong dynamically changed with time performing an effect of expansive weak decoupling during 1995 2014 and having a potential to achieve a strong decoupling in the long run the decoupling states of various sectors and their contributions to the provincial overall decoupling differed greatly and varied by time and household and service sectors played increasingly important roles overall the decoupling effect of provincial co2 emissions is distinctly affected by the stage of industrialisation and urbanisation renewable energy utilisation as well as low carbon technical progress therefore promoting co2 economy decoupling at the provincial level should be specific to the feature and development reality of various provinces

china s energy demand and its characteristics in the industrialization and urbanization process a reply zhang and qin 2013 argued that in jiang and lin 2012 the equation form and variable selection should be altered and it was problematic to use regression equation to project the future in this reply we disagree with and will refute some of the points raised in their comments the model that we established was based on the mature economic theory with the variable selections all having economic implications considering the economic development stage china s urbanization will speed up and this will have significant effect on energy consumption therefore urbanization is an indispensable variable for analyzing energy demand in china the scenario design only in terms of the gdp is sufficient for illustrating energy demand trend in china to be understood in a way by most of the people although energy forecast is not that precise it has an important implication for energy policy design especially for china which is in transition and china s energy demand will keep high growth in the mid term

are the economy and the environment decoupling a comparative international study 1960 20051 ecological modernization theory posits that even though economic development harms the environment the magnitude of the harmful link decreases over the course of development in contrast the treadmill of production theory argues that the strong relationship between environmental harms and economic development will remain constant or possibly increase through time to evaluate these competing propositions interactions between economic development and time are used in cross national panel analyses of three measures of carbon dioxide emissions the results vary across the three outcomes as well as between developed and less developed countries providing mixed support for both theoretical perspectives the authors conclude by discussing how both theories could benefit from engaging contemporary research concerning changes within the transnational organization of production and the structure of international trade and how these global shifts influence environment economic development relationships

home country political risk and foreign direct investment in the united states this study investigates the proposition that home country political risk factors influence outward foreign direct investment investment data from the u s department of commerce is used to model investment activity in the united states from various industrialized source countries foreign direct investment is regressed on home country domestic and international economic and political risk measures for the western industrial countries results indicate that investment activity from the ics in the u s is dependent on home country economic and political conditions

uk competitiveness policy vs japanese industrial policy it is often claimed that japanese industrial policy targeted high growth or high productivity growth sectors see inter alia johnson i982 carliner i986 nester i99i tyson 1992 it is then argued that because both the targeted industries and the japanese economy have prospered it follows that japanese industrial policy must have been successful hence britain and other advanced nations either are justified in emulating or should hasten to follow the japanese example this raises the question of whether the united kingdom s competitiveness policy is the appropriate response or is a completely different animal the purpose of this paper is to explore the main areas in contention but before doing so it is important to be clear about what one means by industrial and competitiveness policies

decomposing the decoupling of co2 emissions and economic growth in brazil abstract this paper examines the occurrence of a decoupling between the growth rates in economic activity and co 2 emissions from energy consumption in brazil from 2004 to 2009 this decoupling was highlighted when economic activity and co 2 emissions moved in opposite directions in 2009 more generally we observe several periods of relative decoupling in brazil but not to the extent witnessed in 2009 to identify the determinants of emissions change we develop a decomposition model based on a log mean divisia index lmdi framework the results indicate that the carbon intensity and energy mix are the main determinant of emissions reduction in brazil between 2004 and 2009 modifications in the economy structure are also associated to emission mitigation in the period such evidence demonstrates similarities with events of decoupling registered for the interval 1980 1994 in brazil finds from brazil differ from observations in other countries in which improvement in energy intensity has been the most common determinant of emissions reduction

the role of geography in financial and economic integration a comparative analysis of foreign direct investment trade and portfolio investment flows the objective of this paper is to examine the role of geography in explaining the patterns of financial and economic integration among both developed and developing countries using a gravity model we compare north north north south and south north fdi trade and portfolio investment flows to examine how geographical factors influence these bilateral flows the results indicate that the impact of geography variables on fdi and portfolio are similar to their effect on trade geography variables have a statistically significant effect both on fdi and portfolio investment but fdi is more sensitive to distance we interpret the negative effect of distance as the existence of information costs in financial flows also bilateral fdi trade and portfolio investment flows react to macroeconomic fundamentals in the same way however with different degrees of sensitivity there are significant differences between north north and north south flows our results find support for the argument that most fdi among industrial countries are horizontal whereas most fdi investment in developing countries is vertical the fact that the significance of geographical variables on financial flows still remained even after controlling for the macroeconomic fundamentals is in contrast with the standard capital market model the results can however be reconciled if geographical factors can proxy for information costs which may in turn explain why country portfolios are still home biased the significant effect of distance on financial flows may also explain how idiosyn cratic shocks are spread i e contagion to other countries in the same region ultimately the geographical location of a country may determine its economic and financial integration into the world economy

the japanese crisis a case of strategic failure this paper provides an alternative insight into japan s current economic problems we concentrate upon the role played by the economy s central actors namely japan s transnational corporations since the early 1980 s japan s transnationals have become dominant players in the global economy and now have a higher rate of physical investment in new overseas greenfield sites than their competitors this has had detrimental consequences for japan s domestic economy particularly for small firms who operate in keiretsu networks this has led to concerns about the hollowing out of japan s domestic industry raising the possibility of long term industrial decline and strategic failure

voting and imitative behavior political behavior generates private benefits by helping people fit in with desired friends a voter imitates other voters but at the same time they imitate him an equilibrium solution requires exogenous variables the narrow self interest of the participants the reduced form makes one s vote a function of the narrow self interest of others as well as one s own in accord with the model a person s party identification depends on his ethnic group s current income and its income in 1909 as well as his own income i introduction what determines how people vote most economists such as peltzman 1980 have emphasized self interested motivations but kau and rubin 1982 and kalt and zupan 1984 claim that ideology based in part on altruism influences voting patterns both hypotheses have the same fundamental flaw they focus on the consequences of the policies for which people vote in the peltzman model a person votes for those policies which maximize his real income i call this narrow self interest in the standard altruism models of economists a person maximizes some weighted average of the real income of himself and others 1 however an individual s vote has a minuscule impact on the outcome of any election therefore his vote for a policy yields extremely small expected returns through the impact of that policy on the voter other returns from voting will dominate in determining behavior if such returns exist some economists for example brennan and buchanan 1984 have recognized this problem with the standard or economic view no one however has developed an alternative theory based on other returns to voting the key point of this paper is that political behavior can generate private benefits by helping people fit in with desired friends and associates a herd effect to give this phenomenon a name political positions are thus chosen not because they produce the desired outcomes for voters but rather because voters want to associate with certain people who have certain positions that is people imitate others in choosing political positions the idea for imitation in political positions is hardly new berelson et al 1954 provide a prima facie case for imitation in voting behavior they found that a person s political position was closely related to the political positions of his coworkers and friends of course these results could be attributable to the fact that these groups share common characteristics but the berelson data also show that people change their political position toward that of their associates a phenomenon more difficult to explain by the common characteristic hypothesis imitation is uninteresting as a predictor of behavior by itself however a voter imitates other voters but at the same time they imitate him an equilibrium solution requires exogenous variables i assume these to be the narrow self interest of the participants the resulting model differs from a simple narrow self interest model in the reduced form one s political decision is a function of the narrow self interest of others as well as one s own narrow self interest imitation along with the self interest of the participants leads both to additional tests of imitation and makes the imitation model of interest in understanding political behavior imitation could be an attempt to please others who have a primitive preference for friends who imitate themselves alternatively imitation could signal an offer of friendship by the imitator without invoking preferences for friends who imitate such signalling could therefore explain why people care whether somebody imitates their political behavior or not imitation could also arise from another process people s views of appropriate behavior could be determined by the behavior of those with whom they associate 2 narrow self interest can also generate a form of imitation imitating the behavior of people with like interests who are more informed

does urbanization drive economic growth decoupled from energy consumption in china s logistics abstract logistics has gradually become a major energy consumer in china along with urbanization and e commerce a better understanding of economic growth decoupled from energy consumption in logistics could relieve the pressure of energy supply and environmental pollution a combined model based on the tapio decoupling model kaya identity and log mean divisia index was proposed to decompose the impact of urbanization into 4 related factors comparative analysis was applied to investigate the similarities of and differences in the urbanization related factors affecting the decoupling state of provinces the main results were as follows 1 weak decoupling was the dominant state of logistics in china during 2007 2016 there were weak decoupling and strong decoupling in most of the observation period in the eastern region while there was no strong decoupling in the central and western regions 2 from the national perspective urbanization related factors had very significant but different impacts population quantity spatial structure and spatial expansion were the key inhibitors while population density was the main contributor 3 from the regional perspective the patterns of urbanization related factors in the three regions were similar population density had a positive but decreasing effect on decoupling in the three regions especially the western region population quantity had an increasing negative effect on decoupling in the three regions especially the central and western regions spatial expansion had an increasing negative effect on decoupling in the eastern and western regions but a decreasing negative effect in the central region and spatial structure had a stable negative effect on the three regions finally some policy implications were proposed

the path of technological progress for china s low carbon development evidence from three urban agglomerations abstract it is widely believed that technological progress is the key driving force for low carbon development based on a panel data of 50 cities during the period 2005 2014 in china s three urban agglomerations beijing tianjin hebei yangtze river delta and pearl river delta this paper presents a comprehensive analysis on the path of technological progress for the low carbon development specifically it firstly estimates the factor biased technological progress by using a translog production function model and then dynamic panel data models are used to investigate the impacts of three sources of technological progress including rd finally we introduce an index to measure the appropriate technical structure and analyze the technological improvement strategy to the low carbon development the main results indicate that technological progress of the three urban agglomerations is biased toward electricity thereby shows a electricity saving effect fdi shows electricity saving and carbon reduction effects but rd the impacts of import and export on the factor biased technological progress are weak furthermore the path of technological progress is highly related to the level of economy when gdp per capita is higher than 37 000 yuan indigenous innovation is the main driver for low carbon development

deviations from constituent interests the role of legislative structure and political parties in the states this paper investigates the determinants of state spending over 1960 1990 recent empirical studies suggest that state government expenditure is greater than the electorate desires our main finding is that expenditure was positively related to the number of seats in a state s legislature this is consistent with the hypothesis that logrolling leads representatives to spend more than their constituents would like we also find that political parties do not have a pronounced effect on overall levels of expenditure but do influence the composition of spending in particular democratic control of state government is associated with higher levels of welfare spending

an analysis of the decoupling relationship between co2 emission in power industry and gdp in china based on lmdi method abstract china predominantly relies on thermal power generation to meet its power requirement which has led to a major increase in total co2 emission and poses a huge threat to the development of power industry in order to reduce co2 emission in power industry and develop economy simultaneously it is necessary to study how to achieve the strong decoupling relationship between co2 emission in power industry and gdp in china however such studies are relatively limited so far thus this paper mainly inquiries the major driving factors on the decoupling during the period of 1985 2016 first the decoupling state in china is quantified by using the tapio decoupling indicator then this paper carries out the decomposition of the decoupling index to explore the driving factors affecting the decoupling by the logarithmic mean divisia index lmdi method and kaya identity equation finally energy consumption in power generation thermal power structure power generation structure transmission and distribution loss electrification energy intensity and economic scale are explored to discuss the decoupling relationship with respect to the co2 emission reduction the results show that the decoupling relationship is in an alternating state between weak decoupling and expansive negative decoupling in 1985 2016 and the influences of seven factors on the decoupling relationship are of difference wherein energy intensity as well as energy consumption in power generation promotes the decoupling while both the economic scale and electrification are the two main factors that inhibit the decoupling the other three factors have relatively weak effects therefore based on the empirical results this paper puts forward some policy suggestions to effectively promote the decoupling between china s electric co2 emission and economic growth

how to promote the growth of new energy industry at different stages abstract china is currently the world s largest emitter of carbon dioxide co2 vigorously developing new energy sources has become an important way to reduce co2 emissions therefore more and more scholars have studied effective ways to promote the development of new energy industry however most of the existing research use single equation linear models or static models to study the driving forces of the new energy industry this not only ignores the large number of dynamic relationships between economic variables but also produces endogeneity problems in order to overcome the shortcomings of existing research this paper uses vector autoregressive model to study the new energy industry the results show that energy consumption structure has a positive effect on the new energy industry in the short run but the effect is limited in the long run the impact of the agriculture industry is gradually narrowing over time due to the gradual reduction of crop acreage however the influence of economic growth is positive both in the short and long run this is due to the gradual optimization of industrial structure technological progress produces a similar impact owing to continued investment in research and development funding as well as research and development personnel

decomposition of co2 emissions over 1980 2003 in turkey abstract there is a multi dimensional need for studying the energy situation in turkey and to obtain insight into the development of co2 emissions on the one hand recent projections of the oecd show that turkey has a yearly gdp growth potential of over 7 on the other hand recent projections of undp and world bank indicate that the level of co2 emission is going to rise six fold by 2025 with respect to the level of emissions in 1990 it is a great challenge to both meet the growth target and keep the co2 under control thereupon this paper tries to unfold factors that explain co2 emissions by undertaking a complete decomposition analysis for turkey over the period 1980 2003 the analysis shows as is common to relatively fast growing economies that the biggest contributor to the rise in co2 emissions is the expansion of the economy scale effect the carbon intensity and the change in composition of the economy which nearly move in tandem also contribute to the rise in co2 emissions albeit at a slower rate the energy intensity of the economy which is decreasing is responsible for a modest reduction in co2 emissions hence in congruence with the scale effect a decoupling of carbon emissions and economic growth is not found in turkey over the period 1980 2003

explaining the national cultural distance paradox past studies of the relationship between national cultural distance and entry mode choice have produced conflicting results some scholars find cultural distance associated with choosing wholly owned modes others find cultural distance linked to a preference for joint ventures in this paper we provide both theoretical and empirical evidence to explain the discrepant findings and thus help to resolve the national cultural distance paradox

macro determinants of fdi inflows to japan an analysis of source country characteristics this paper examines the source country determinants of fdi into japan the paper highlights certain methodological and theoretical weaknesses in the previous literature and offers some explanations for hitherto ambiguous results specifically the paper highlights the importance of panel data analysis and the identification of fixed effects in the analysis rather than simply pooling the data indeed we argue that many of the results reported elsewhere are a feature of this mis specification to this end pooled fixed effects and random effects estimates are compared the results suggest that fdi into japan is inversely related to trade flows such that trade and fdi are substitutes moreover the results also suggest that fdi increases with home country political and economic stability the paper also shows that previously reported results regarding the importance of exchange rates relative borrowing costs and labour costs in explaining fdi flows are sensitive to the econometric specification and estimation approach the paper also discusses the importance of these results within a policy context in recent years japan has sought to attract fdi though many firms still complain of barriers to inward investment penetration in japan the results show that cultural and geographic distance are only of marginal importance in explaining fdi and that the results are consistent with the market seeking explanation of fdi as such the attitude to risk in the source country is strongly related to the size of fdi flows to japan 2007 the authors journal compilation 2007 blackwell publishing ltd

business models for sustainable biofuel transport the potential for intermodal transport the use of solid wood biofuels for energy production in heating plants has increased drastically during the last decades great interest has been shown in replacing unsustainable road transport of wood fuel with more sustainable intermodal transport this paper maps the common business models for biofuel transport in sweden and suggests how these models may be developed to accommodate intermodal transport a view of the biofuel supply chain as five overlapping networks industry material operations transport and infrastructure connected by four transaction markets sourcing operations transport and traffic have been used four typical business models have been found regional national biofuel company local biofuel company heating plant own account and wood processing industry cooperation and vertical integration among the actors are important to reach the large transport volumes required for intermodal transport key issues to increase the intermodal potential are increased vertical integration and cooperation sharing of transport resources and infrastructure joint purchases outsourcing to expert actors building trust and open communication and not underestimating the complexity of intermodal transport the results have implications for any actor interested in developing intermodal transport or policy measures the contribution includes the new approach of developing business models by using the five layer network market model

decoupling factors on the energy output linkage the spanish case the recent increase of energy intensity in spain and the ratification of the kyoto protocol call for the implementation of energy policies in spain in this paper we investigate the relationship between gross domestic product gdp and energy consumption ec by taking into account several decoupling factors that can affect this linkage specifically we have considered the temporal aggregation of data and its seasonal adjustments the multivariate methodology the substitution between ec and other inputs and the technological changes empirical tests reveal a long run relationship between ec and gdp that can only be established in a complete way with a multivariate cointegration analysis furthermore a short run unidirectional causality from ec to economic growth is found therefore primary ec plays an important role as a limiting factor for economic growth in spain in the short run

real exchange rate risk expectations and the level of direct investment four models of direct investment are analyzed assuming various relationships between foreign and domestic production the direct effect of risk adjusted expected real foreign currency appreciation is to lower foreign capital cost thus stimulating direct investment however when costs of other inputs are also affected induced productivity changes or output price changes may offset the direct effect reducing direct investment pooled estimation results for u s annual bilateral direct investment flows to five industrialized countries show significant reductions associated with expected appreciation of real foreign currency and significant increases associated with risk these results are consistent with the model where in response to risk the multinational firm reduces exports to the foreign country but offsets this somewhat by increasing foreign capital input and production

decomposition of carbon intensity in electricity production technological innovation and structural adjustment in china s power sector abstract china s power generation accounted for 24 of the world s total output ranking first in 2015 as a suitable performance indicator carbon intensity of electricity reflects a variation in the average level of carbon emissions per unit of electricity generated as the largest carbon emitter among various industries power sector is in duty bound to reduce carbon emissions and achieve sustainable development great progress has been made in china s power sector which is reflected by the effects of technological innovation and structural adjustment with logarithm transformation and integral transformation three dimensional decomposition model is proposed to quantitatively measure the changed carbon intensity of electricity due to technological innovation and structural adjustment in the context of three dimensional model the variation of carbon intensity can be decomposed into absolute changes and or relative changes furthermore accumulative decomposition results are obtained by chain linked calculation rules finally the proposed models are implemented in china s power industry to reveal its historical progress during 1980 2014 some important conclusions are also found based on the decomposition results

on the internationalization process of firms a critical analysis even though international marketing has been challenged because of theoretical and methodological shortcomings very few researchers have actually attempted to analyze the weaknesses based on principles of theory evaluation in this article the author examines two types of models addressing the individual firm s internationalization process a theory evaluation is performed based on the explanation and the falsification criteria in order to improve the internationalization models some measures are proposed

is energy transition promoting the decoupling economic growth from emission growth evidence from the 186 countries abstract a more comprehensive understanding the effects of energy transition on the decoupling economic growth from carbon emission growth at global and national scale can serve to develop more effective approaches towards to economic growth without emission growth this paper combined decoupling index model and decomposition approach to identify decoupling state and uncover factors driving decoupling process in the world and 186 countries divided into three groups upper middle income umi lower middle income lmi and high income hi between 1990 and 2014 regarding to decoupling state world experienced weak decoupling 1990 2000 expansive negative decoupling and expansive coupling 2000 2011 and weak decoupling 2011 2014 hi initially realized the most desirable strong decoupling while decoupling state of umi and lmi were rather not ideal enough especially lmi changed violently and appeared no clear improving trend turning to decomposition results energy transition had positively contributed to decoupling process of hi while not in umi and lmi hi enjoyed better energy utilization efficiency absolutely offsetting negative impact caused by economic scale to decoupling process more importantly umi and lmi had great economic potential and will definitely emit tremendous carbon emission without taking appropriate measurements consequently umi and lmi shall take more responsibility to reduce carbon emission and actively accelerate the process of energy transition so as to achieve economic growth strongly decouple from carbon emission

decomposition analysis for assessing the progress in decoupling industrial growth from co2 emissions in the eu manufacturing sector decomposition analysis is used in this paper not only to explain changes in industrial co2 emissions but also to comparatively evaluate the progress made in 14 eu countries in decoupling emissions from industrial growth the analysis is performed for the period 1990 2003 by distinguishing two time intervals for assessing progress prior to and following the agreement on the kyoto protocol the refined laspeyres model is used to determine the impact of 5 explanatory factors output energy intensity structure fuel mix and utility mix the obtained results are further elaborated in order to assess the real efforts undertaken in each country and their effectiveness in dissociating the economic and environmental dimensions of development moreover a rescaling procedure is implemented in order to adjust efforts to the average progress in the eu and proceed to a fair comparative evaluation it is found that most eu countries made a considerable but not always sufficient decoupling effort while no significant acceleration is observed in the post kyoto period

determinants of foreign direct investment empirical evidence from eu accession candidates this study examines bilateral foreign direct investments fdi between the members of the european union and eight central and east european candidate ceec economies in transition awaiting accession into the european union eu crosssection data were obtained for bulgaria czech republic estonia hungary poland romania slovak republic and slovenia for 1997 once the main characteristics of fdi recipient and donor nations are identified in a bilateral framework it will be feasible to predict future fdi inflows this study reveals that the key determinants of fdi inflows in ceecs are size of the host economy host country risk labour costs in host country and openness to trade countries that are receiving fewer foreign investments could make themselves more attractive to potential donor nations by focusing on some of the key determinants identified by this study

interest groups and the size of government the results of the previous section estimates of a three equation model from 23 observations must obviously be regarded as tentative the consistent positive relationship between number of interest groups and size of government observed with changing sets of included independent variables changing samples of nations and treating the number of interest groups as either exogenous or codetermined does imply rather unequivocally that interest groups are able to influence public policies in such a manner as to lead to increased government size beyond helping to reinforce this conclusion the results of the previous section should be regarded as first steps in the development of a model of the polity that can explain participation in the political process by interest groups and citizens as well as the size of government

policy and non policy determinants of u s equity foreign direct investment this study examined the effects of policy and non policy variables on the location of new u s direct investment abroad as distinct from reinvested earnings of existing affiliates using 1977 and 1982 benchmark data the data revealed statistically significant effects for investment incentives positive performance requirements negative and host country effective tax rates negative with interesting differences between the two time periods and between developed versus developing countries significance was also found for non policy variables such as political stability cultural distance gdp per capita and infrastructure

is the median voter a clear cut winner comparing themedian voter theory and competing theories in explaining localgovernment spending this paper attempts to test the power of the median model againstthe respective strength of other alternate models based onredistributive political institutional and interest group theoriesin explaining the demand for public spending in new york statecounties during 1990 1980 and 1970 to execute the comparison ofthe performance of median voter model with that of each of thenonmedian voter ones various nonnested tests such as j and jatests n tilde w and encompassing tests have been employed results of the study show that although the median voter model hasa marginal edge over the rival models based on the alternativetheories it may not be relied upon solely when many otherinstitutional redistributive and interest group factors are alsorelevant for explaining public spending the results of this studydiffer from those in congleton and bennett 1995 we do not findthat interest group models are substantially weaker than the medianvoter model

the abatement of carbon dioxide intensity in china factors decomposition and policy implications to deal with the challenges brought about by climate changes china decided to reduce the carbon dioxide co2 intensity by 40 45 per cent from 2005 to 2020 using the decomposition technique this study finds that energy intensity is the most important force to drive the decline of co2 intensity between 1980 and 2008 followed by structural factors such as the adjustment of energy and industrial structure therefore any environmental policy to promote energy efficiency will play the biggest role in achieving the target of abating co2 intensity in 2020

on the political economy of state highway expenditures some evidence of the relative performance of alternative public choice models this paper explores the extent to which the public demand for roads and or power of special interest groups determines road expenditures at the state level using an extension of the methodology developed in congleton and shughart 1990 reduced form models of median voter demand special interest group equilibria and a combined model are estimated using cross sectional state data from the united states we generally find support for the hypothesis that voting matters the pure median voter models have a better fit than the pure special interest group models moreover in our combined model we find that variables from the median voter model can not be dropped without significantly reducing the combined model s fit