variable returns to agglomeration and the effect of road traffic congestion abstract this paper investigates the links between returns to urban density productivity and road traffic congestion a generalised translog production inverse input demand function is estimated to test for the existence of variable returns to agglomeration in manufacturing construction and service industries two separate measures of urban density in which proximity is represented by straight line distance or by generalised cost are constructed and included in the translog to identify the effect of road traffic congestion the results show that for some sectors of the economy diminishing returns to urban density can set in causing the magnitude of agglomeration elasticity to fall as effective densities increase the generalised cost based measure of agglomeration produces higher elasticities because it captures both time and distance dimensions of density a comparison of spatial variance in estimates indicates that road traffic congestion plays an important role in explaining diminishing returns for the most highly urbanised locations

does trading non timber forest products drive specialisation in products gathered for consumption evidence from the brazilian amazon abstract diversification is a hallmark of family based rural production but what happens when autarkic rural communities integrate into markets economic theory predicts that households will maintain diversified strategies when faced with risk however many studies have claimed that openness to markets drives specialisation to enhance returns nevertheless there is little evidence about the association between trade in non timber forest products ntfps and the diversity of ntfps consumed relying on a household survey and systematic observations of brazilian amazonian caboclos we evaluated whether exposure to ntfp markets effort and cash income correlates with the diversity of ntfps consumed richness and simpson diversity the results were conflicting first there was variation across ntfp subtypes although the variety richness of terrestrial ntfps consumed vegetables and hunted animals was greater in households trading ntfps the richness of fish consumed was lower because fishing could not be pursued concurrently with activities related to ntfp trade second the observed effects differed across indicators of diversity which shows that intensification in the use of a few resources may occur third the associations with alternative definitions of exposure to the ntfp market also differed these results indicate that ntfp markets do not necessarily undermine local consumption diversity

agglomeration economies and industrial decentralization the wage productivity trade offs abstract this paper examines the industrial location trade offs between the productivity advantages of the metropolitan center and the lower land and the labor costs in outlying regions within the state of sao paulo brazil the results indicate that while plant productivity is enhanced by the considerable agglomeration economies existing within metropolitan sao paulo firms must pay for these benefits in high wages and land costs offsetting labor cost savings can be achieved by locating in outlying regions the evidence presented in this paper suggests that market forces may lead eventually to a spontaneous decentralization of industry

measuring the forest and income impacts of forest user group participation under malawi s forest co management program abstract we evaluate the impacts of forest user group participation under malawi s forest co management program on forest clearing and household income we use panel data collected in 2002 and 2009 in two districts of malawi we employ a two step regression strategy to control for endogenous selection into the program using propensity score weighting and propensity score analysis with non parametric regression we find that the program lowered the rate and extent of forest clearing we also find that the program had no discernible impact on household forest incomes suggesting that the program helped achieve environmental goals without compromising household livelihoods

is protection for sale evidence on the grossman helpman theory of endogenous protection grossman and helpman 1994 present a theory of endogenous protection by explicitly modeling government industry interactions for which mere black box models previously existed they obtain a ramsey pricing type solution to the provision of protection which emphasizes the role of inverse import penetration ratios and import elasticities on the lobbying side the model makes predictions about lobbying competition and lobbying spending according to deadweight costs from protection the model not only makes for richer theory in terms of rigor and elegance but its predictions are directly testable whether the grossman helman model stands up to real world data is investigated in this paper predictions from both the protection side and lobbying side are tested using cross sectional u s nontariff barrier data we also compare the second generation grossman helpman model with a more traditional specification our results call for serious consideration of this model in the political economy literature

compact cities and economic productivity in mexico this paper examines the contingent nature of agglomeration economies existing empirical evidence that compact cities are more productive is mostly from countries and regions with highly productive

marshallian factor market externalities and the dynamics of industrial localization abstract when an industry has thus chosen a locality for itself it is likely to stay there long so great are the advantages which people following the same skilled trade get from near neighborhood to one another a localized industry gains a great advantage from the fact that it offers a constant market for skill employers are apt to resort to any place where they are likely to find a good choice of workers while men seeking employment naturally go to places where there are many employers who need such skill as theirs the advantages of variety of employment are combined with those of localized industries in some of our manufacturing towns and this is a chief cause of their continued growth alfred marshall principles of economics 8th ed pp 271 272 1920

child labor and agricultural shocks this paper examines the relationship between household income shocks and child labor in particular we investigate the extent to which transitory income shocks lead to increases in child labor and whether household asset holdings mitigate the effects of these shocks using data from a household panel survey in tanzania we find that both relationships are significant we investigate mechanisms that could account for these results including buffer stocks and borrowing

spatial variations in new manufacturing plant openings some empirical evidence from greece fotopoulos g and spence n 1999 spatial variations in new manufacturing plant openings some empirical evidence from greece reg studies 33 219 229 this research deals with the determinants of regional variation in new plant openings in greek manufacturing industries over the period 1980 91 key findings of this first detailed attempt to do so in a greek context relate to the significant direct effects of regional specialization the extent of local production links and investment in public infrastructure on new manufacturing activity confirming research findings in other countries the results obtained here indicate small firm presence the local supply of skilled labour and wealth and labour productivity differentials across regions to be significant and positive influences on new firm formation fotopoulos g et spence n 1999 la variation geographique de la creation d entreprises industrielles quelques preuves empiriques provenant de la grece reg studies 33 219 229 cet article traite

ex ante and ex post labor supply response to risk in a low income area abstract this paper tests for ex ante and ex post labor supply responses to weather risk for rural indian farm households the analysis uses panel data on 2115 households spanning 13 states in rural india merged with a 22 year series of district level rainfall data ex ante households facing riskier distributions of rainfall are more likely to participate in the labor market ex post unexpectedly bad weather and low rainfall increase labor force participation

regional policy and investment behaviour the case of greece 1971 1982 louri h 1989 regional policy and investment behaviour the case of greece 1971 1982 reg studies 23 231 239 the present paper reports an attempt to evaluate the relative effects of regional policy on investment in greek manufacturing industry during 1971 82 a generalized neoclassical model of investment behaviour is used allowing for separate estimates of the effects of different policy instruments both regional investment incentives and infrastructure expenditures were found to exert a significant influence on capital formation simulations with alternative policy combinations showed that if incentives were accompanied by more equally distributed infrastructure expenditures the cost of the policy would be the same but its effects would be enhanced an equal amount of investment would be created with a fairer regional distribution louri h 1989 la politique regionale et le comportement d investissement etude de cas de la grece de 1971 a 1982 reg studies 23 231 239 cet article fait un comp

search sorting and urban agglomeration studies have suggested that urban agglomeration enhances productivity by facilitating the firm worker matching process this article develops a model that formalizes this notion and demonstrates that when firm capital and worker skill are complementary in production urban agglomeration will tend to generate more efficient yet segregated matches as a result not only will local market size be positively associated with average productivity it will also generate greater between skill group wage inequality and a higher expected return to skill acquisition recent data from the counties and metropolitan areas of the united states is consistent with each of these implications

the economics of poverty traps and persistent poverty an asset based approach abstract longitudinal data on household living standards open the way to a deeper analysis of the nature and extent of poverty while a number of studies have exploited this type of data to distinguish transitory from more chronic forms of income or expenditure poverty this paper develops an asset based approach to poverty analysis that makes it possible to distinguish deep rooted persistent structural poverty from poverty that passes naturally with time due to systemic growth processes drawing on the economic theory of poverty traps and bifurcated accumulation strategies this paper briefly discusses some feasible estimation strategies for empirically identifying poverty traps and long term persistent structural poverty as well as relevant extensions of the popular foster greer thorbecke class of poverty measures the paper closes with reflections on how asset based poverty can be used to underwrite the design of persistent poverty reduction strategies

economies of network urban agglomeration and regional development a theoretical model and empirical evidence zheng x p 2007 economies of network urban agglomeration and regional development a theoretical model and empirical evidence regional studies 41 559 569 concerning urban and regional development it seems that the effect of agglomeration economies has been extensively studied but very little attention has been paid to the contribution from the economies of network this paper attempts to show that regional development is not only brought about by the economies of urban agglomeration but also that it results from the transportation network it presents a theoretical model for analysing the relationship between the economies of network and urban agglomeration and regional development meanwhile it also provides some empirical evidence from the japanese regional economies zheng x p 2007 les economies de reseau l agglomeration urbaine et l amenagement du territoire un modele theorique et des preuves empiriques regional studies 41 559 569 pour ce qui est de l amenagement du territoire i

count on the growth pole strategy for regional economic growth spread backwash effects in greater central china ke s and feser e count on the growth pole strategy for regional economic growth spread backwash effects in greater central china regional studies this paper investigates spread backwash effects associated with non agricultural gross domestic product and employment growth across 922 cities and counties in central china between 2000 and 2005 simultaneous equation estimates find mixed spread backwash effects from prefecture and higher level cities to comparable or lower level cities and counties spread effects of gross domestic product and employment growths are also indicated between county level cities however county level cities exerted backwash effects on rural counties the paper discusses the implications of these findings in relation to the construction of urban economic growth zones in central china as an important strategy of central rise ke s et feser e devrait on compter sur la strategie de poles de croissance afin d assurer la croissance economique regionale les effets de repartition

declining city productivity and the growth of rural regions a test of alternative explanations prior to the 1970s the u s witnessed a net flow of migrants from its nonmetropolitan to its metropolitan region since then however a dramatic reversal of this long standing tendency for people to concentrate in metropolitan places has been observed nonmetropolitan places have gained migrants largely as the result of increased outmigration from metropolitan areas an open question has been to what extent the employment profile between metropolitan and nonmetropolitan places parallels that of population this paper introduces a data series compiled from county business patterns that is used to analyze the employment trends for the first time the analysis reveals that not only is total employment growing fastest in nonmetropolitan counties but it also appears that the turnaround in employment growth preceded the reversal in the rate of population increase manufacturing which had faster nonmetropolitan growth rates even during the 195os appears to have led in the development of nonmetropolitan counties this shift of manufacturing has attracted other sectors as well as people to nonmetropolitan places part of the recent growth of nonmetropolitan counties represented nothing more than a continuation of suburbanization or spillover of people and jobs which permitted one more outward bound into adjacent nonmetropolitan counties but there is more to nonmetropolitan development than simply metropolitan spillover nonmetropolitan counties far removed from metropolitan ones are also growing faster than metropolitan counties it is shown that this rural renaissance is part of a general deconcentration

the importance of local fiscal conditions in analyzing local labor markets a new test of the compensating wage differential model is proposed the logic behind roback s model which shows how differences in nonproduced amenities may be reflected in intercity wage differentials is extended to the case of differences in local fiscal conditions represented by tax rates and publicly produced services results show that differences in local tax rates and services provisions do generate compensating wage differentials across cities the effects of a particularly large set of taxes and effective services output measures are examined differences in local fiscal conditions are shown to play important roles in explaining the variance in intermetropolitan wages

protection for sale in a developing country democracy vs dictatorship for a genuine small open economy that has experienced both dictatorship and democracy we find support for the predictions of the grossman helpman 1994 protection for sale model in contrast to previous studies we use various protection measures including tariffs the direct measure of the theoretical model and perform both single year and panel regressions using turkish industry level data the government s weight on welfare is estimated to be much larger than that on contributions more importantly we find that this weight is generally higher for the democratic regime than for dictatorship

estimating dynamic localization economies the inadvertent success of the specialization index and the location quotient estimating dynamic localization economies the inadvertent success of the specialization index and the location quotient regional studies after addressing definitional issues on the concepts of c

urban wages and labor market agglomeration abstract using the 5 public use micro sample of the 1990 u s census we find that observationally equivalent workers in the manufacturing sector earn higher wages when they are in urban labor markets that have a larger share of national or metropolitan employment in their same occupation and industry groups quantitatively the effect is large with an elasticity measured at the means of between 1 2 and 3 6 for these effects we interpret the willingness of firms to pay more for equivalent workers in dense markets as evidence of an agglomeration economy in urban labor

evidence and explanation for the tariff lobbying paradox endogenous tariffs fall as protectionist lobbying rises recent empirical evidence suggests that u s protectionist lobbying expenditures rose while u s trade barrier fell we find that the same result holds in our panel data sample from 28 countries be

measuring optimal population distribution by agglomeration economies and diseconomies a case study of tokyo this paper presents an empirical study on the optimality of population distribution within the tokyo metropolitan area by taking into account the effects of agglomeration economies and diseconomie

the heterogeneous effect of shocks on agricultural innovations adoption microeconometric evidence from rural ethiopia abstract theoretically the relationship between shocks and agricultural innovation adoption could be ambiguous while shocks could lower the competence and capacity of households to adopt new agricultural innovations households can also take up agricultural innovations as a coping mechanism against the different shocks they face using a nationally representative household data from ethiopia of the living standards measurement study integrated surveys on agriculture lsms isa of the world bank this paper analyzes the effect of idiosyncratic and covariate shocks on adoption of different agricultural innovations assuming interdependence among the innovations we find shocks to have heterogeneous effects on the adoption of agricultural innovations specifically production and health shocks have negative effects on the adoption of high cost innovations such as improved seeds chemical fertilizer and irrigation however production shocks are positively associated with low cost innovations such as organic fertilizer to enhance farmers adoption of agricultural innovations especially high cost innovations there is a greater need towards the design of policies and interventions that would reduce household s exposure to production and health shocks

how large is too large implications of the city size literature for population policy and research in the development literature of the late 1960s and 1970s urbanization and urban problems were often taken to be synonymous both the theories and the preliminary empirical studies of the period appeared to connect urbanization directly with unemployment2 and with crowding congestion social stress and pollution the high visibility of such disamenities coupled with their political implications persuaded developing country governments of the necessity to constrain or even reverse urban growth 3 the antiurbanization perspective achieved its high point in the declarations of the 1974 world population plan of action at bucharest since that time it has gradually been supplanted by more balanced assessments of the contribution made by cities to economic growth 4 even so the potential benefits of urban growth have not yet received the emphasis given to the potential costs whether in policy discussions or in much of the literature on third world urbanization 5 this is unfortunate for it can be argued that agglomeration economies those external returns in production that occur when firms cluster together spatially provide an economic

group specific effects of interregional mobility on earnings a microdata analysis for germany lehmer f and moller j group specific effects of inter regional mobility on earnings a microdata analysis for germany regional studies the paper analyses the relationship between regional mobility and earnings for different groups of workers using a large panel microdata set the authors find negative earnings differentials of movers in the year before migration and strong evidence for significant wage gains through mobility a decomposition of blinder oaxaca type reveals different group specific rewards effects suggesting a positive post mobility wage differential of movers over the incumbent workforce for some groups irrespective of the region of destination the existence of a general wage growth effect of mobility appears to be robust and cannot be explained by the time invariant part of unobserved heterogeneity lehmer f et moller j l impact sur les revenus la mobilite interregionale des groupes specifiques des groupes sur les revenus une analyse des donnees microeconomiques pour l allemagne

how store format choices and market structure affect agglomeration economies and competition among chain stores in the us supermarket industry this article studies how store format choices and market concentration affect agglomeration economies and competition among chain stores using data on supermarket chains in arizona georgia and il

reconsidering the empirical evidence on the grossman helpman model of endogenous protection the emergence of the grossman and helpman 1994 model of endogenous protection as the preeminent model in the political economy of trade literature has been significantly advanced by the finding that its predictions about the cross industry pattern of protection are broadly consistent with the data however in their empirical implementation of the grossman helpman model researchers have assumed the presence of multiple policy instruments and extraneous political factors we argue that incorporating these assumptions into the theory significantly changes its predictions about the cross industry pattern of protection jel classification f1 l emergence du modele de protection endogene de grossman helpman en tant que modele le plus important dans la litterature sur l economie politique du commerce international a ete confirmee de maniere significative quand on a decouvert que ses predictions quant au pattern de protection a travers les industries se trouvaient generalement confirmees par les donnees cependant dans leur verification empirique du modele de grossman helpman les chercheurs ont postule la presence de multiples instruments de politique publique et de certains facteurs politiques on suggere que l ajout de ces postulats change de maniere significative les predictions du modele quant au pattern de protection dans les divers secteurs

the evolution of regional productivity disparities in the european union from 1975 to 2002 a combination of shift share and spatial econometrics le gallo j and kamarianakis y the evolution of regional productivity disparities in the european union from 1975 to 2002 a combination of shift share and spatial econometrics regional studies this paper evaluates the relative significance of the key factors that underlie regional productivity disparities in the european union industry mix and structural regional differences shift share decomposition is performed and the outcomes are investigated with exploratory spatial analysis and space time econometric models substantial changes in the spatial patterns of productivity and its determinants can be observed during the study period results indicate a decrease in geographical clustering for productivity and both regional and sectoral factors spatio temporal dependencies are essential for correct model specification as their omission results in an overestimation of the effect of the industry mix le gallo j et kamarianakis y l evolution des ecarts de productivite regionaux dans l union europeenne

asset smoothing consumption smoothing and the reproduction of inequality under risk and subsistence constraints abstract a growing literature asks whether low wealth agents can accumulate assets over time or whether they are trapped in poverty this paper develops a stochastic dynamic programming model with endogenous asset price risk to explore savings and portfolio decisions in a resource poor environment characterized by risk and subsistence constraints optimal portfolio strategies are found to bifurcate despite divisible assets and fully rational agents wealthier agents acquire a higher yielding portfolio and pursue conventional consumption smoothing poorer agents acquire a less remunerative portfolio and pursue asset smoothing rather than consumption smoothing asset based risk coping thus results in positive correlation between initial wealth and portfolio rate of return

productivity and city size a critique of the evidence a critique of two leading articles in the productivity and city size literature results in revised estimates of the productivity advantages of large cities in particular extant estimates of the elasticity of productivity with city size are revised downward by over 100 percent for the manufacturing sector and about 25 percent for the entire urban economy after revision productivity advantages of larger cities are found to be much larger for the nonmanufacturing sector than for the manufacturing sector hence revitalization policies for large cities should be focused on nonmanufacturing sectors

determinants and effects of income diversification amongst farm households in burkina faso using four years of household data from three agroecological zones in burkina faso sahelian sudanian and guinean the article examines the determinants and effects of household income diversification harvest shortfalls and terms of trade are found to drive diversification but land constraints do not income diversification is associated with higher incomes and food consumption and more stable income and consumption over years

a productivity growth interpretation of the labour demand shift share model graham d j and spence n 1998 a productivity growth interpretation of the labour demand shift share model reg studies 32 515 525 this paper proposes modifications to the labour demand shift share model set out in this journal by casler 1989 to allow for its implementation and to extend its use to analyses of regional labour productivity growth the paper begins by briefly outlining the theoretical basis for the shift share method provided in casler s paper and then goes on to present a specific reformulation of the model which incorporates input price and technological growth effects on labour demand these additional effects are defined as productivity components within the shift share model and the empirical and theoretical implications of the modifications made are discussed in the paper an empirical example of the results obtained through the modified labour demand shift share model is then provided for selected british regions the paper concludes by outlining potential uses of the modif

spatial wage disparities sorting matters spatial wage disparities can result from spatial differences in the skill composition of the workforce in non human endowments and in local interactions to distinguish between these explanations we estimate a model of wage determination across local labour markets using a very large panel of french workers we control for worker characteristics worker fixed effects industry fixed effects and the characteristics of the local labour market our findings suggest that individual skills account for a large fraction of existing spatial wage disparities with strong evidence of spatial sorting by skills interaction effects are mostly driven by the local density of employment not controlling for worker heterogeneity leads to very biased estimates of interaction effects endowments only appear to play a small role

cash transfers enable households to cope with agricultural production and price shocks evidence from zambia abstractclimate change is projected to dramatically disrupt rainfall patterns and agricultural yields in sub saharan africa these shocks to food production can mire farming households in poverty t

economic shocks diversification and forest use in uganda we investigate household outcomes arising from economic shocks in rural uganda focusing on patterns of income diversification and forest use and the role of assets in shaping ex post response to shocks income poor households and those with below average landholdings are observed to have more diversified income portfolios than their cohorts households encountering above average losses tend to have more diversified income portfolios subsequent to the losses larger negative shocks are associated with greater use of the forest in subsequent periods especially among asset poor households findings suggest that development of better safety nets would reduce both vulnerability and forest pressure

industrial bases and city sizes away from heavy manufacturing and bluecollar occupations and towards professional activities communications finance insurance real estate and high tech activities should we expect these gains and losses to be spread across cities or are certain cities likely to be gainers and others losers in terms of population are losers likely to experience permanent declines in population or for some will their losses level off or will they rebound if the growth industries of an economy operate best in larger cities while declining industries tend to reside in smaller cities this implies national population will shift from smaller cities to locating in larger cities this increase in urban concentration means there will be changes in other patterns of resource usage efficient levels of per capita resources devoted to urban infrastructure roads sewers parks etc tend to rise with city size and it is a common perception that the magnitudes of certain consumer externalities congestion air and water pollution crime etc rise with city size this has implications for public policies governing the allocation of public investment and governing the regulation of externalities moreover the changes in population allocation between larger and smaller cities itself involves to some extend a painful process of population upheavals and there may be public policies which can alleviate the costs of the adjustment process in this paper i outline a conceptual framework and empirical methodologies from which some of these issues can be examined

productivity growth in british manufacturing spatial variation in the role of scale economies technological growth and industrial structure this paper investigates the role of scale economies technological growth and industrial structure in creating spatial variation in manufacturing labour and total factor tfp productivity in britain separate estimates of a translog specification are presented for british manufacturing firms located in defined areas of the country over the period 1994 1998 the results show that tfp change due to scale economies and technological growth has been of much less important in influencing the output growth of manufacturing firms than input growth or industrial structure regarding the components of tfp technological growth has been the dominant force at play the analysis of average labour productivity identifies shifts to other factors of production and industrial structure as being the main determinants of change scale economies appear to have had a marginal role the results identify spatial patterns indicating that more favourable locational effects arise for firms in areas adjacent to large urban centre

amenities and regional differences in returns to worker characteristics average wages in regions in the united states vary considerably in trying to explain these differences in the average wage across regions a number of studies have found that differences in the returns to characteristics of workers such as years of schooling are as important as differences in the skill composition of the labor force 4 6 10 141 these differences in returns are generally interpreted as reflecting regional differences in demand for worker characteristics coupled with barriers to factor mobility this interpretation is based on the argument that the presence of at least one perfectly mobile factor with perfect information will cause spatial convergence in characteristic prices as that particular factor exploits any spatial price differential 4 p 2161 this paper suggests an alternative to this demand based explanation for regional differences in the structure of wages one based on regional differences in the supply of worker characteristics this explanation does not rely on impediments to the movement of workers or firms and is consistent with an equilibrium view of wages in which regional wage differentials are viewed as compensation for local amenities the theoretical model presented in the following section assumes capital and labor are perfectly mobile with perfect information implying that in equilibrium the utility of workers with similar characteristics is the same in all locations this convergence of utility however does not necessarily imply convergence of characteristic prices equilibrium differences in the returns to a specific worker characteristic can exist if worker characteristics affect an individual s valuation of an area s amenities relative to the individual s demand for land

determinants of income diversification amongst rural households in southern mali abstract household level panel data from a representative sample of rural households in southern mali describing the different sources of household income are used to examine the determinants of income diversification a conditional fixed effects logit model is employed in the analysis to control for household specific effects we find evidence that poorer households have fewer opportunities in non cropping activities such as livestock rearing and non farm work and hence less diversified incomes this appears to reflect their relative lack of capital which makes it difficult for them to diversify away from subsistence agriculture the results also indicate that households in remote areas are less likely to participate in the non cropping sector than their counterparts closer to local markets while households with educated heads are more likely to participate in the non farm sector than those with illiterate heads the significance of entry constraints in explaining portfolio diversification suggests that the role of government in making assets as well as improved infrastructure available to poorer households is still essential in promoting income diversification

can income programs reduce tropical forest pressure income shocks and forest use in malawi summary seasonal household data from malawi are used to study links between income shocks and forest use a tobit model is estimated to examine whether household forest use responds to receipt of a positive income shock delivered as a technology assistance package and the characteristics of households reliant on forests for shock coping results show households experiencing an income boost had lower forest extraction compared to households that did not receive such a shock ceteris paribus we find households most dependent on forests for natural insurance are those located near woodlands and headed by an individual who is relatively young and male 2005 published by elsevier ltd

no place like home relocation capabilities and firm survival in the german machine tool industry after world war ii we explore the extent to which organizational capabilities are location specific by studying the location choices and longevity of east german machine tool producers that relocated to west germany after world war ii relocating firms were similar in performance to experienced west german incumbents they outperformed new entrants without prewar industry experience this suggests they were able to build on capabilities acquired before the war even though relocating firms tended lo locate in industry agglomerations and in urbanized regions we find no evidence suggesting that firm performance benefited from agglomeration economies copyright 2011 the author 2010 published by oxford university press on behalf of associazione icc all rights reserved oxford university press

urbanisation and regional productivity in korean manufacturing as the first study for korea we estimate the effects of urbanisation and localisation economies on the productivity of 19 korean manufacturing industries in 1983 1988 and 1993 based on the observation that material inputs contributed about 60 per cent of productivity growth in korea we consider gross output productivity which is an innovation that distinguishes our study from previous ones we find that localisation economies have been dominant features of korean manufacturing industries whereas korean manufacturing industries did not benefit much from locating in large cities more interestingly there are some indications of quadratic relations between city size and urbanisation economies

protection for sale with imperfect rent capturing we extend the protection for sale framework to non tari barriers introducing partial rent capturing leads to a testable specification that bridges the gap between the grossman and helpman 1994 model and its empirical implementation where coverage ratios have been used to measure protection the econometric analysis supports our augmented specification and leads to more realistic estimates for the structural parameters of the model jel classification f13

lobbying competition over trade policy counterlobbying over trade policy competition between opposing lobbies is an important factor in the endogenous determination of trade policy this paper investigates empirically the consequences of lobbying competition between upstream and downstream producers for trade policy the theoretical structure underlying the empirical analysis is the well known grossman helpman model of trade policy determination modified suitably to account for the cross sectoral use of inputs in production itself a quantitatively significant phenomenon with around 50 percent of manufacturing output being used by other sectors rather than in final consumption data from more than 40 countries are used in our analysis our empirical results validate the predictions of the theoretical model with lobbying competition importantly accounting for lobbying competition also alters substantially estimates of the welfare mindedness of governments in setting trade policy

substitutability and protectionism latin america s trade policy and imports from china and india this article examines the trade policy response of latin american governments to the rapid growth of chinese and indian exports in world markets to explain more protection in sectors where a large share of imports originates in china and india the protection for sale model is extended to allow for region specific degrees of substitutability between domestic and imported varieties of a good the results suggest that more protection toward chinese and indian goods can be explained by the higher substitutability of chinese and indian goods with domestic varieties the data support the model which performs better than the original protection for sale framework in explaining latin america s structure of protection

marshall s scale economies and jacobs externality in korea the role of age size and the legal form of organisation of establishments this paper revisits the concept of agglomeration economies by estimating the effects of localisation urbanisation and local competition on labour productivity using establish ment level data in korean manufacturing industries it is found that when an establish ment locates in a more localised specialised more urbanised diversified and more competitive area its workers become more productive due to external benefits from agglomeration issues of self selection bias and omitted variable bias are addressed by instrumenting the variables measuring localisation economies and controlling for the fixed effects of establishments location and industries year however the external effects from the spatial proximity of other establishments vary across the categories of industry type age size and legal form of organisation of establishments establishments in traditional heavy manufacturing industries receive more external benefits in a less diversified area while those in transport equipment manufacturing industries enjoy the largest benefits from localisation externalities exist for establishments aged between 2 and 7 years having at least 10 workers being corporate and having multiplants or not being headquarters establishments in relatively young industries rely more on diver sified environments while establishments in relatively old industries receive greater external benefits in the same industry cluster this result supports the product life cycle location theory of duranton and puga

using weather variability to estimate the response of savings to transitory income in thailand this paper measures the extent to which farmers are able to use savings and dissavings to smooth consumption in response to unexpected shocks to income time series information on regional rainfall is used to construct estimates of transitory income due to rainfall shocks the relationship between these measures of transitory income and savings indicates that farm households save a significantly higher fraction of transitory income than nontransitory income jel d91 016 the incomes of farm households in developing countries are notorious for being both low and uncertain policies that increase the incomes of farmers may well be different

globalization and the skilled city abstract the location of economic activity both across and within countries has undergone dramatic shifts over the last five decades three key trends stand out first cross country inequality has declined as many developing countries have grown rapidly second economic geography within countries has instead grown more unequal in both the developed and the developing world third within country spatial disparities have grown mainly because of the disproportionate success of skilled cities in this paper i develop a model that jointly explains these patterns as a consequence of deepening international economic integration my model explains the faster population and output growth of skilled cities as well as their tendency to increase their initial skill advantage consistent with the evidence my theory predicts a non monotonic path of urban growth in developed countries the model predicts a future shift in worldwide urban hierarchies as some developing world cities overtake unskilled cities in industrialized countries along global supply chains

forest clearing livelihood strategies and welfare evidence from the tsimane in bolivia this study analyzes the relationship between forest households livelihood strategies and forest clearing and the relationship of both to welfare the analysis relies on a rich panel dataset collected on the tsimane communities in bolivia to highlight how forest households combine sales and wage activities forest clearing is associated with all livelihood strategies but the association with welfare differs depending on the strategy pursued households that clear more and that generate their earnings by combining agricultural sales and wage activities are better off judged in terms of assets than those undertaking other strategies by contrast households in a subsistence strategy are not able to accumulate assets in the long run overall households clear only small areas of forest which has a positive effect on welfare and enables accumulation of assets

protection for sale or surge protection this paper asks whether the results obtained from using the standard approach to testing the influential grossman and helpman protection for sale pfs model of political economy might arise from a simpler setting a model of imports and quotas with protection occuring in response to import surges but only for organized industries is simulated and shown to provide parameter estimates consistent with the protection for sale framework this suggests that the standard approach may be less of a test than previously thought

can we obtain realistic parameter estimates for the protection for sale model in the grossman and helpman 1994 model of endogenous trade protection sectoral lobbies try to influence an incumbent government that maximizes a weighted sum of political contributions and aggregate welfare we empirically investigate this model using u s and turkish data our specification is more tightly tied to theory than those in existing studies additionally we assume all specific factor owners to be organized into different lobbies these changes validated by hypothesis tests yield more realistic parameter estimates of the government s concern for aggregate welfare and of the fraction of population organized into lobbies peut on obtenir des calibrations realistes des parametres du modele de protection en vue d augmenter les ventes dans le modele de protection commerciale endogene de grossman helpman 1994 des lobbys sectoriels tentent d influencer un gouvernement en place qui maximise une somme ponderee des contributions politiques et du bien etre collectif les auteurs utilisent ce modele pour analyser les donnees pour les etats unis et la turquie on specifie le modele d une maniere qui serre de plus pres la theorie que ce qui a ete le cas dans les etudes anterieures de plus on assume que tous les proprietaires de facteurs de production specifiques sont organises en lobbys differents ces changements valides par des tests d hypotheses engendrent des estimations plus realistes des parametres de la fonction d interet du gouvernement pour le bien etre collectif et pour la fraction de la population organisee en lobbys

safety nets gap filling and forests a global comparative perspective summary in the forest livelihoods literature forests are widely perceived to provide both common safety nets to shocks and resources for seasonal gap filling we use a large global comparative dataset to test these responses we find households rank forest extraction responses to shocks lower than most common alternatives for seasonal gap filling forest extraction also has limited importance the minority of households using forests for coping is asset poor and lives in villages specialized on forests in particular timber extraction overall forest resources may be less important as a buffer between agricultural harvests and in times of unforeseen hardship than has been found in many case studies 2014 published by elsevier ltd

tracing the sources of local external economies in a cross sectional establishment level analysis using confidential secondary data the paper evaluates the influence of commonly postulated sources of localised external economies supplier access labour pools and knowledge spillovers on the productivity of two us manufacturing sectors farm and garden machinery and measuring and controlling devices measures incorporating different distance decay specifications provide evidence of the spatial extent of the various externality sources chinitz s 1961 hypothesis of the link between local industrial organisation and agglomeration economies is also investigated the results show evidence of labour pooling economies and university linked knowledge spillovers in the case of the higher technology measuring and controlling devices sector while access to input supplies and location near centres of applied innovation positively influences efficiency in the farm and garden machinery industry both sectors benefit from proximity to producer services although primarily at a regional rather than a highly localised scale

plant size and industry mix effects on uk regional productivity wage costs and operating surplus roper s 1998 plant size and industry mix effects on uk regional productivity wage costs and operating surplus reg studies 32 325 332 the ability of a region to create wealth depends both on the competitiveness of its individual firms and its industrial structure this paper examines the effect of industry mix and plant size structure on the wealth generating capacity of the uk regions from 1980 91 reflecting the findings of similar us studies the analysis suggests that in general uk regions structural disadvantages act to reinforce rather than counter plant level productivity wage cost and operating surplus profitability differentials thus lagging regions face a three fold disadvantage poorly performing plants disadvantageous industry mix and plant size structure this suggests a need for a strategic approach to policy which must aim to counter regions structural disadvantages as well as to improve the competitiveness of existing plants roper s 1998 les effets de la taille des et

identifying human capital externalities theory with applications the identification of aggregate human capital externalities is still not fully understood the existing mincerian approach confounds positive externalities with wage changes due to a downward sloping demand curve for human capital as a result the mincerian approach yields positive externalities even when wages equal marginal social products we propose an approach that identifies human capital externalities whether or not aggregate demand for human capital slopes downward another advantage of our approach is that it does not require estimates of the individual return to human capital applications to u s cities and states between 1970 and 1990 yield no evidence of significant average schooling externalities copyright 2006 wiley blackwell

demand elasticities in international trade are they really low the authors analyze the u s demand for bangladeshi imports for products restricted under the multifiber arrangement because bangladesh is only a small supplier of these products and latin american and asian countries can supply close substitutes the authors expected a high elasticity of demand for bangladeshi imports and they found consistently high estimates based on statistically significant coefficients their finding accords with trade theorists prejudice that small countries can essentially behave as price takers but conflicts with the empirical literature view that demand elasticities are low rarely exceeding 3 and generally between 1 and 2 the authors analysis differs from the existing literature in three ways they derive a set of estimation equations from an explicit utility maximization model and use the estimated parameters of the utility function to obtain the marshallian own price and cross price elasticities as well as the income elasticity of demand they take explicit account of u s imports from competitors of bangladesh relying directly on competitors prices and they use highly disaggregated data that make the unit value of exports a better proxy for price than using aggregated export data commonly used in this literature the authors outline their theoretical model for deriving their estimated equations in section 1 preliminarily determine who bangladesh s competitors are in section 2 and estimate the demand equation derived in section 1 and derive the price and income elasticities facing bangladesh in section 3

endogenous lobby formation and endogenous protection a long run model of trade policy determination this paper provides a theory of lobby formation within a framework in which trade policy is determined through political contributions under certain conditions free trade turns out to be an equilibrium outcome either when the government has a high affinity for political contributions or when it cares a great deal about social welfare moreover greater inequality in asset distribution results in a greater number of lobbies and in most cases more protection for each of these lobbies furthermore industries with higher levels of capital stock fewer capitalists more inelastic demand and smaller geographical dispersion are the ones that get organized

external economies as a mechanism of agglomeration in eu manufacturing productive externalities are significant determinants of agglomeration not deeply studied at the industry and international level we analyse the impact on productivity growth of technological externalities both inter and intraindustry national or international at the industry level for the eu countries and the period 1995 2002 the results confirm the advisability of considering international externalities when countries are taken as regions whose omission underestimates national spillovers together with national endowments and a central geographical position the growth of productivity is encouraged by national and international specialization as a general result moreover it is fuelled by stronger interindustry spillovers and productive diversification a result more evident for high technology industries while lower technology industries are more sensitive to the omission of international externalities economic integration seems to be relevant because supranational regions with less frictio

agglomeration economies localization or urbanization i estimate localization and urbanization economies with a methodology and data different from those of henderson and nakamura after demonstrating the problems associated with using a single agglomeration variable i present my estimates as nakamura found for japanese cities i find evidence of both localization economies and urbanization economies but i also find evidence of urbanization diseconomies in some industries as did henderson my evidence for localization and urbanization economies in american cities is stronger than henderson s evidence finally i show that the pattern of agglomeration economies by industry is consistent with observed patterns of industrial location

urbanization in a developing country city size and population composition abstract in developing countries typically there is a very high correlation between city size and educational attainment of the local population which is less pronounced or even absent in developed countries such as canada the u s a or the u k two explanations are examined first the types of goods produced in larger cities require relatively high skill labor inputs second public and perhaps private services demanded by higher skill people are only offered in larger cities the paper econometrically tests these hypotheses for brazil estimating the elasticities of substitution or typically complementarity between high and low skill labor and the bright lights effect for high versus low skill labor

policy comparisons with an agglomeration effects augmented dual economy model abstract in this paper we incorporate urban agglomeration economies as a labor pull factor in an analysis of dual labor markets in ldcs in particular the equilibrium city size approach to urban growth and the expected income approach to rural to urban migration are synthesized making it possible to generalize results that hitherto were approach specific with the aid of a simulation based on a well specified model we exploit this synthesis to rank subsidy policies our results highlight the constructive role played by urbanization in economic development and structural change

forest reliance across poverty groups in tanzania an emerging body of knowledge has established that poorer households in forest adjacent communities in developing countries are generally more forest reliant higher forest income share while richer households tend to extract more and generate higher absolute forest income these studies commonly categorize households based on observed income in cross section data presenting a snap shot reflecting both inter household and inter annual income variation in this paper we introduce a new approach to categorize households based on a combination of the observed one year income and predicted income by an augmented asset approach applying this approach on household data from tanzania we find forest reliance to be high among structurally poor households low observed income and assets the highest forest reliance is found among the stochastically non poor households high income and low assets and this group also has the highest absolute forest income

firm location and city size reduced productivity advantages as a factor in the decline of manufacturing in urban areas abstract this paper develops a model of firm location and city size that arrives at theoretical conclusions that differ from those of other authors comparative statics results suggest that changes in national wage levels and productivity levels create no determinate dis advantage for large cities relative to small ones as sites for manufacturing activity increased wage and reduced productivity premiums of large cities however result in unambiguous disadvantages statistical analysis indicates that the productivity advantages of large cities have declined in as many as eight two digit manufacturing industries that provide more than one third of metropolitan production worker employment

worker turnover industry localization and producer size abstract empirically large employers have been shown to devote greater resources to filling vacancies than small employers following this evidence this paper offers a theory of producer size based on labor market search whereby a key factor in the determination of a producer s total employment is the ease with which workers can be found to fill jobs that are periodically vacated since the geographic localization of industry has long been conjectured to facilitate the search process the model provides an explanation for the observed positive association between average producer size and the magnitude of an industry s presence within local labor markets

manufacturing productivity and city size in canada 1975 and 1985 does population matter this paper analyses the relationship between manufacturing productivity and city size based on canadian data for 1975 and 1985 the results differ in some respects from those of us studies in particular in canada city size appears to have a weaker impact on manufacturing productivity and an impact which is diminishing over time these findings may be a consequence of several differences in the characteristics of canadian and us firms as well as differences between the two urban systems urbanisation economies in canada may also have been weakened by regional development policies there are at the same time some striking similarities in the industries which show positive urbanisation economies in the us and canada there is also a tendency in canada for both industries with smaller firms and industries with higher rates of domestic ownership to exhibit greater urbanisation economies

firm location decisions regional grants and agglomeration externalities we examine whether discretionary government grants influence where domestic and multinational firms locate new plants and how the presence of agglomeration externalities interacts with these policy instruments we find that a region s existing industrial structure has an effect on the location of new entrants grants do have a small effect in attracting plants to specific geographic areas but importantly we find that firms are less responsive to government subsidies in areas where there are fewer existing plants in their industry this suggests that these subsidies are less effective in influencing firms location decisions in the face of countervailing co location benefits