explaining agricultural productivity growth an international perspective this article presents multi output multi input total factor productivity tfp growth rates in agriculture for 88 countries over the 1970 2001 period estimated with both stochastic frontier analysis sfa and the more commonly employed data envelopment analysis dea we find results with sfa to be more plausible than with dea and use them to analyze trends across countries and the determinants of tfp growth in developing countries the central finding is that policy and institutional variables including public agricultural expenditure and proagricultural price policy reforms are significant correlates of tfp growth the most significant geographic correlate of tfp growth is distance to the nearest oecd country

what motivates managers choice of discretionary accruals abstract the papers by subramanyam 1996 and kasanen kinnunen and niskanen kkn 1996 both consider why managers manipulate accounting accruals subramanyam finds that discretionary accruals are associated with several performance measures and concludes that managers accrual choices increase the informativeness of accounting earnings however a strong competing alternative is that the jones model systematically mismeasures discretionary accruals so that they contain a significant non discretionary component unlike many us studies kkn find strong evidence of earnings management in finland where finnish managers set earnings to satisfy the demand for dividends by keiretsu like institutional investors

banking deregulation and industry structure evidence from the french banking reforms of 1985 we investigate how the deregulation of the french banking industry in the 1980s affected the real behavior of firms and the structure and dynamics of product markets following deregulation banks are less willing to bail out poorly performing firms and firms in the more bank dependent sectors are more likely to undertake restructuring activities at the industry level we observe an increase in asset and job reallocation an improvement in allocative efficiency across firms and a decline in concentration overall these findings support the view that a more efficient banking sector helps foster a schumpeterian process of creative destruction many economies around the world are characterized by heavily regulated bank

mark to market accounting for banks and thrifts lessons from the danish experience university of michigan tharvard university we appreciate helpful suggestions received from participants at the stanford summer camp and the price waterhouse symposium workshop participants at the university of chicago cornell university indiana university the ohio state university university of michigan university of pittsburgh university of rochester university of southern california tulane university and university of utah mary barth bill beaver george benston allen berger fisher black paul healy jack hughes robert kaplan richard leftwich jim leisenring niels nielsen finn ostrup bob ruland pete wilson and an anonymous referee we also appreciate the assistance of our contacts in denmark who shared their time and expertise with us so willingly these include mr ole bjarrum and mr lars nielsen of nykredit mr jesper jesperson and mr aksel olsen of kpmg revisionsfirmaet c jespersen mr lars tonnesen and mr birger schmidt of the danish bankers association mr kim hartvig olsen of the danish financial supervisoryauthority mr jorgen kock of den danske bank and professors jens elling merete christiansen finn ostrup and niels nielson of the copenhagen business school we thank professors dwight crane and bob kaplan of the harvard business school and bob swieringa and jim leisenring of the financial accounting standards board for help in conducting this research we are grateful for financial statement data furnished by the danish financial supervisory authority for access to the account database provided by professors elling and christensen of the copenhagen business school and for excellent research assistance by elizabeth andersen christine botosan marlene plumlee and james myers we also appreciate the willingness

workforce education and technical change bias in u s agriculture and related industries the number of hours devoted to value added output in the north american industry classification system naics sector agriculture forestry fishing and hunting is increasingly supplied by individuals with advanced schooling consistent with hypotheses of a positive relationship among technology development adoption and dissemination and a more highly skilled workforce we first test and then conclude that the composition of the workforce is closely aligned with measures of the state of technology consistent with many other studies technical change has been labor saving overall yet technologies adopted have reduced both the absolute and relative numbers of workers not progressing beyond high school the changing composition of the workforce and technical change have driven an average wedge of 31 between reported wages and wages augmented by our estimates of the state of technology this gap was greater in the period prior to the mid 1980s when many of the changes in the education levels of the labor force occurred using estimates from the entire 1947 2010 period the quantity of work provided by the worker hired in 2010 was 31 greater than if no change in labor composition had occurred

induced innovation in american agiculture a reconsideration this paper investigates the role of induced innovation in the development of american agriculture from 1880 to 1980 the induced innovation hypothesis most closely associated with the work of hayami and ruttan argues that successful economies develop technologies in accordance with market price signals to loosen constraints on growth imposed by factor scarcities our analysis employing new state and regional level data fails to find support for hayami and ruttan s hypothesis this paper suggests that many of the fundamental generalizations about american agricultural development need to be reconsidered and redirects attention to the role of settlement changing crop patterns and biological investments in explaining changes in factor utilization in american agriculture

an equilibrium model of incentive contracts in the presence of information manipulation abstract this paper develops an agency model in which stock based compensation is a double edged sword inducing managers to exert productive effort but also to divert valuable firm resources to misrepresent performance we examine how the potential for manipulation affects the equilibrium level of pay for performance sensitivity and derive several new cross sectional implications that are consistent with recent empirical studies in addition we analyze the impact of recent regulatory changes contained in the sarbanes oxley act of 2002 and show how policies intended to increase firm value by reducing misrepresentation can actually reduce firm value or increase the upward bias in manipulated disclosures

the green revolution and the productivity paradox evidence from the indian punjab the author provides district level estimates of the contribution of technical change to agricultural output growth in the indian punjab from 1960 to 1993 contrary to widespread belief productivity growth in the punjab was surprisingly low during the green revolution in the mid 1960s when modern hybrid seed varieties were being adopted it improved later after adoption of the new varieties was essentially complete the author proposes three reasons for this pattern 1 the standard measure of total factor productivity overstates the contribution of capital to output growth at the expense of the productivity residual high yielding varieties introduced in the 1960s helped spur output growth by making crops responsive to water and fertilizer which not only allowed but indeed encouraged far greater use of capital inputs this increase in the elasticity of the output response to capital inputs is incorporated into the index of factor accumulation and therefore excluded from the measure of total factor productivity growth as a result the contribution of technical change to growth in punjab s agriculture during the green revolution is probably underestimated 2 the overstatement of the capital contribution during the green revolution is exacerbated by indivisibilities in capital inputs 3 productivity growth did not come from the adoption of modern varieties alone improved resource management and public investment in infrastructure also helped improve productivity

examining crop price effects on production decision and resource allocation an ex ante approach this article examines the output price effects on the us crop production employing an ex ante approach to the differential systems of input demand and output supply the estimation results of the

detecting earnings management a new approach this paper provides a new approach to test for accrual based earnings management our approach exploits the inherent property of accrual accounting that any accrual based earnings management in one period must reverse in another period if the researcher has priors concerning the timing of the reversal incorporating these priors can significantly improve the power and specification of tests for earnings management our results indicate that tests incorporating reversals increase test power by around 40 and provide a robust solution for mitigating model misspecification arising from correlated omitted variables

productivity and environmental costs from intensification of farming a panel data analysis across eu regions this paper addresses the need of finding new ways of measuring the environmental and economic consequences of farming the aim of this study is to inquire into the impacts that excessive intensification has on productivity and environmental costs in the long term and additionally to explore empirically the trend of these two indicators over time the contribution of this paper is to perform an empirical study of the trends of productivity and environmental costs of farming in the long term to this end this paper performs a panel data analysis of productivity and environmental costs on a farm accounting database across european regions over the 1989 2009 period the models proposed take i farm output per hectare as indicator of productivity and ii expenditures on energy pesticides and fertilisers per hectare as proxy indicators of environmental costs results provide empirical evidence that the regions under study have a negative trend of productivity and a positive trend of environmental costs over the time frame mentioned these results correlate negatively with both economic and environmental sustainability of farms arguably this is aggravated in the latter due to hidden environmental costs valued at zero in traditional accounting

the global supply and demand for agricultural land in 2050 a perfect storm in the making the number of people which the world must feed is expected to increase by another 2 billion people by 2050 when coupled with significant nutritional improvements for the 2 1 billion people currently living on less than 2 day this translates into a very substantial rise in the demand for agricultural production most past growth in the demand for food has been met by improvements in productivity but there is evidence of declining growth rates for agricultural yields climate change is likely to have important impacts on productivity through changes in temperature and precipitation land based climate mitigation policies are also projected to lead to increasing pressure on agricultural lands meanwhile supplies of water for irrigation are under pressure urban land use is on the rise and demands for setting aside land for environmental purposes continue to increase clearly an enormous amount of additional research on ways to deal with this potential perfect storm is needed this paper highlights the explores the roles of biophysical and economic uncertainty in these projections of long run land use change using this to suggest a future research agenda

earnings management under price regulation empirical evidence from the spanish electricity industry abstract this paper analyses the effect of price regulation on the accounting policy of spanish electricity companies over the period 1991 2001 as predicted by the political costs hypothesis watts and zimmerman 1986 watts r l zimmerman j l 1986 positive accounting theory prentice hall englewood cliffs nj managers artificially reduce reported earnings when the government establishes tariff increases in this way companies attempt to diminish their political visibility and counteract social outcry arising from the government s decision several abnormal accruals models existent in the literature are used to obtain a proxy for managerial accounting discretion on earnings

exploring the widening food gap an international perspective using data for a long panel of 90 developed and developing countries this article explores the effects of research and development r d and fixed capital stock on agricultural land productivity over the period 1961 2012 instruments are used for r d to deal with feedback effects and measurement errors the results show very high social returns to investment in r d and to fixed capital stock suggesting that increasing investment in these factors are promising ways of arresting the increasing food prices due to increasing demand for animal protein population growth desertification salinization soil erosion climate change and decreasing growth in land productivity

agriculture in the global economy agriculture is diverse and full of contradictions the sector accounts for a griculture is diverse and full of contradictions the sector accounts for a comparatively small share of the global economy but remains central comparatively small share of the global economy but remains central to the lives of a great many people in 2012 of the world s 7 1 billion to the lives of a great many people in 2012 of the world s 7 1 billion people an estimated 1 3 billion 19 percent were directly engaged in farming people an estimated 1 3 billion 19 percent were directly engaged in farming but agriculture including the relatively small hunting fi shing and forestry sectors but agriculture including the relatively small hunting fi shing and forestry sectors represented just 2 8 percent of overall income world bank 2012 however in represented just 2 8 percent of overall income world bank 2012 however in today s middle and low income countries where most of the world s farmers are today s middle and low income countries where most of the world s farmers are to be found agriculture accounts for a much greater share of national income and to be found agriculture accounts for a much greater share of national income and employment for instance in india agriculture represents 18 percent of national employment for instance in india agriculture represents 18 percent of national income and 54 percent of employment income and 54 percent of employment 1

demographic change and policy responses implications for the global economy the fertility declines associated with the final phase of the global demographic transition have led to slower population growth and accelerated ageing in developed countries and in several advanced developing countries a global demographic and economic model is used to assess the implications of these changes for population sizes age gender distributions labour force growth and their implications for economic performance a baseline projection that incorporates declining fertility is compared with a hypothetical constant population growth scenario the results show that slower population growth and ageing reduces average saving rates in industrial regions yet global investment demand is also slowed and saving rates rise in developing regions so there is no net tightening of financial markets increased aged labour force participation considered one solution to the resulting rise in aged dependency in advanced regions is found to redistribute investment in favour of the industrialised regions and hence to accelerate their per capita income growth while conferring on the other regions compensatory terms of trade improvements the alternative of replacement migration is found to require inconceivably large population movements it also impairs real per capita growth in destination regions but by least in western europe where the terms of trade are improved by the immigration

surplus distribution from the introduction of a biotechnology innovation we examine the distribution of welfare from the introduction of bt cotton in the united states in 1996 the welfare framework explicitly recognizes that research protected by intellectual property rights generates monopoly profits and makes it possible to partition these rents among consumers farmers and the innovating input firms we calculate a total increase in world surplus of 240 3 million for 1996 of this total the largest share 59 went to u s farmers the gene developer monsanto received the next largest share 21 followed by u s consumers 9 the rest of the world 6 and the germplasm supplier delta and pine land company 5

factors associated with the year end decline in working capital working capital is an important indicator of firm operational efficiency all else being equal lower levels signal greater efficiency managers are thus likely to be motivated to report lower levels of working capital at times of greater external attention we find that working capital levels decrease in the fourth fiscal quarter significantly more than expected conditional on seasonal changes in economic activity the decrease subsequently reverses in the following first fiscal quarter evidence indicates that firms manage down year end working capital through transactions that increase year end operating cash flow and that firms spread this activity over all working capital accounts finally the temporary decrease in year end working capital is correlated with compensation benchmarks and analysts annual cash flow forecasts the temporary drop is also more pronounced for firms with industry dominance this paper was accepted by mary barth accounting

policy and competitiveness of agroforestry based technologies for maize production in cameroon an application of policy analysis matrix abstract questions have been raised about the ecological consequences and economic sustainability of exclusive reliance on chemical fertilizers for the rapidly expanding maize production across sub saharan africa alternative agroforestry based natural resource management technologies have been developed for farmers this paper applies the policy analysis matrix pam to analyze the social profitability of agroforestry based technologies for maize production in the highland savanna zone of cameroon and the impacts of policy shifts on the financial competitiveness of maize production under these technologies the paper shows that maize production under agroforestry based systems has high comparative advantage

anticompetitive financial contracting the design of financial claims this paper presents the first model where entry deterrence takes place through financial rather than product market channels in standard models of the interaction between product and financial markets a firm s use of financial instruments deters entry by affecting product market behavior whereas in our model entry deterrence occurs by affecting the credit market behavior of investors towards entrant firms we find that in order to deter entry the claims held on incumbent firms should be sufficiently risky i e equity in contrast to the standard branderlewis 1986 result that debt deters entry the model sheds light on the policy debate on the separation of banking as to whether banks should be permitted to hold equity in firms it also provides an explanation for why venture capitalists hold automatically convertible securities in start up firms

the relation between earnings based measures in firm debt contracts and ceo pay sensitivity to earnings abstract i investigate how implicit incentives provided by earnings based debt covenants affect the structure of ceo compensation contracts this provides a new and unique view of how the ceo s incentives are shaped by not only his compensation contract but also debt contracts i find when debt contracts contain an earnings based covenant the ceo s pay sensitivity to earnings is muted additionally i find some evidence that pay sensitivity to earnings varies with earnings based covenant slack this study provides evidence consistent with shareholders rebalancing the ceo s earnings incentives in the presence of earnings based covenants thereby tilting incentives away from earnings performance

ldc agriculture nonparametric malmquist productivity indexes abstract this paper examines changes in agricultural productivity in 18 developing countries over the period 1961 1985 we use the nonparametric output based malmquist index to examine whether the results from such an approach confirm results from other methods that have indicated declining agricultural productivity in less developed countries ldcs the results confirm previous findings indicating that at least half of these countries have experienced productivity declines in agriculture we also found that those countries that tax agriculture most heavily had the most negative rates of productivity change

nonlinear dynamics in discretionary accruals an analysis of bank loan loss provisions abstract several studies have analyzed discretionary accruals to address earnings smoothing behaviors in the banking industry we argue that the characteristic link between accruals and earnings may be nonlinear since both the incentives to manipulate income and the practical way to do so depend partially on the relative size of earnings given a sample of 15 268 us banks over the period 1996 2011 the main results in this paper suggest that depending on the size of earnings bank managers tend to engage in earnings decreasing strategies when earnings are negative big bath use earnings increasing strategies when earnings are positive and use provisions as a smoothing device when earnings are positive and substantial cookie jar accounting this evidence which cannot be explained by the earnings smoothing hypothesis is consistent with the compensation theory neglecting nonlinear patterns in the econometric modeling of these accruals may lead to misleading conclusions regarding the characteristic strategies used in earnings management

a new global database on agriculture investment and capital stock abstract this paper introduces a new analytical database on aggregate physical investment flows and capital stock in agriculture forestry and fishing for 189 countries and territories over the period 1995 2017 long time series of the agricultural investment to value added ratio are employed to obtain agricultural investment flows these latter are subsequently converted into capital stock series by applying a variant of the perpetual inventory method this article describes the database content and the data sources the methodology used to deal with missing data in the investment to value added ratio as well as several measurement issues underlying its development lastly it presents an overview of the main global and regional trends in agricultural gross fixed capital formation and capital stock drawing some implications and directions for future research

the asymmetric relationship between executive earnings management and compensation a panel threshold regression approach abstractprior research shows that chief executive officers ceos are rewarded for their earnings management we re examine this issue using a panel threshold regression approach which allows the effect of earnings management on the ceo compensation to change across the level of earnings management and ceo compensation our results show that the effect of ceos discretionary accounting choices on their compensation is not homogeneous across various degrees of earnings management and compensation in particular for firms with moderate inordinate levels of earnings management and ceo compensation earnings management is rewarded penalized

the impact of global warming on agriculture a ricardian analysis reply we measure the economic impact of climate on land prices using cross sectional data on climate farmland prices and other economic and geophysical data for almost 3 000 counties in the united states we find that higher temperatures in all seasons except autumn reduce average farm values while more precipitation outside of autumn increases farm values applying the model to a global warming scenario shows a significantly lower estimated impact of global warming on u s agriculture than the traditional production function approach and in one case suggests that even without co sub 2 fertilization global warming may have economic benefits for agriculture 16 refs 5 figs 5 tabs

debt covenant violation and manipulation of accruals abstract this paper examines the abnormal accruals of a sample of 94 firms that reported debt covenant violations in annual reports we expect debt covenant restrictions to influence accounting choices in the year preceding and the year of violation time series and cross sectional models are used to estimate normal accruals in the year prior to violation both models indicate that abnormal total and working capital accruals are significantly positive in the year of violation there is evidence of positive abnormal working capital accruals after controlling for management changes and auditor going concern qualifications

accounting information and corporate governance market and analyst reactions to earnings of firms engaged in proxy contests abstract this paper studies market and analyst reactions to earnings i during a proxy contest for board seats and ii after a proxy contest induced management change despite indications of earnings management during the proxy contest market and analyst reactions are more pronounced than in prior periods and earnings surprises explain more of the cross sectional variation in these reactions market and analyst reactions to earnings released after a successful proxy contest are less pronounced than in prior periods and earnings surprises explain less of the variation in these reactions perhaps due to new managements tendency to take an earnings bath

empirical research on accounting choice abstract we review research from the 1990s that examines the determinants and consequences of accounting choice structuring our analysis around the three types of market imperfections that influence managers choices agency costs information asymmetries and externalities affecting non contracting parties we conclude that research in the 1990s made limited progress in expanding our understanding of accounting choice because of limitations in research design and a focus on replication rather than extension of current knowledge we discuss opportunities for future research recommending the exploration of the economic implications of accounting choice by addressing the three different reasons why accounting matters

are there increasing returns to pollution abatement empirical analytics of the environmental kuznets curve in pesticides abstract according to the environmental kuznets curve ekc hypothesis economic growth and the reduction of environmental degradation are compatible goals an inverted u shaped relationship between economic performance and environmental pollution suggests that empirically an economy is associated with smaller levels of pollution after some threshold income point one potential explanation for the empirical evidence of an ekc is increasing returns to pollution abatement where the abatement efficiency rises with an increase in the scale of abatement doubling the clean up efforts more than doubles the abatement of pollution as this efficiency gain makes abatement less expensive pollution might fall as more abatement is undertaken this study tests the hypothesis that there are increasing returns to abating pollution empirical evidence on environmental risks in the us agricultural sector since 1970 support the existence of increasing returns in addition i estimate the productivity of pollution abatement using refined empirical productivity measurement methods and explicitly control the level of technology the results show the importance of including an environmental productivity variable in the ekc framework

international productivity patterns accounting for input quality infrastructure and research in this paper we present measures of land and labor productivity for a group of ninety eight developed and developing countries using an entirely new data set with annual observations spanning the past three decades the substantial cross country and intertemporal variation in productivity in our sample is linked to both natural and economic factors we extend previous work by dealing with multiple sources of systematic measurement error in conventional agricultural inputs the mix of conventional inputs indicators of quality of agricultural inputs and the amount of publicly provided infrastructure are all significant in explaining observed cross sectional differences in productivity patterns

total factor productivity growth in agriculture a malmquist index analysis of 93 countries 1980 2000 in this paper we examine levels and trends in agricultural output and productivity in 93 developed and developing countries that account for a major portion of the world population and agricultural output we make use of data drawn from the food and agriculture organization of the united nations and our study covers the period 1980 2000 due to the non availability of reliable input price data the study uses data envelopment analysis dea to derive malmquist productivity indexes the study examines trends in agricultural productivity over the period issues of catch up and convergence or in some cases possible divergence in productivity in agriculture are examined within a global framework the paper also derives the shadow prices and value shares that are implicit in the dea based malmquist productivity indices and examines the plausibility of their levels and trends over the study period

tripling africa s primary exports what how where abstract income growth in africa that is high enough to achieve the internationally agreed development goals implies a rise in the region s per capita income by the early 2020s to about latin america s current level the paper shows that such income growth would be associated roughly with a nine fold increase in africa s manufactured exports but also with a tripling of its primary exports which in absolute terms would account for two thirds of the increase in the region s total exports focusing on the demand potential for such an increase in africa s primary exports the paper argues that rising global demand from sustained rapid growth in natural resource poor asian countries particularly china provides sizeable new opportunities for africa s primary exports in africa extractive industries are poised best to benefit directly from china s rising imports while exporters of agricultural products are more likely to benefit indirectly from rising world market prices associated with asia s growing prim

corporate profitability and the dynamics of competition in emerging markets a time series analysis the paper presents time series analyses of corporate profitability in seven leading developing countries dcs using the common methodology of the persistence of profitability pp studies and systematically compares the results with those for advanced countries acs surprisingly both short and long term persistence of profitability for dcs are found to be lower than those for acs the paper concentrates on economic explanations for these findings it also reports the results on the persistence of the two components of profitability output capital ratios and profit margins these too raise important general issues of economic interpretation for pp studies which are outlined

annual bonus schemes and the manipulation of earnings abstract using confidential data of executive specific short term bonus plans we investigate the extent to which executives manipulate earnings to maximize the present value of bonus plan payments as such this paper extends the work of healy 1985 like healy we find evidence consistent with the hypothesis that managers manipulate earnings downwards when their bonuses are at their maximum unlike healy we find no evidence that managers manipulate earnings downwards when earnings are below the minimum necessary to receive any bonus we demonstrate that healy s results at the lower bound are likely to be induced by his methodology

the meta production function approach to technological change in world agriculture abstract an alternative meta production function for agriculture is estimated with the cross section data for 43 countries and three years 1960 1970 and 1980 constructed and used by kawagoe hayami and ruttan and hayami and ruttan in their studies by allowing for country specific efficiency factors and using a flexible functional form the transcendental logarithmic production function strikingly different results from those of kawagoe hayami and ruttan are obtained in particular it is found that elasticity of output with respect to machinery is variable and the degree of local returns to scale is not constant and increases with the usage of machinery

productivity growth in world agriculture sources and constraints during the last half century advances in crop production came from expansion in areas irrigated from more intensive application of fertilizers and crop protection chemicals and from crop varieties that were more responsive to technical inputs and management advances in animal production came from genetic improvements and advances in animal nutrition differences among developed and developing countries in output per hectare and per worker have widened if these gaps are to be narrowed agricultural research capacity in developing countries will have to be substantially strengthened

productivity growth in u s agriculture a postwar perspective there has been a long standing fascination with productivity trends in u s agriculture in part this stems from the historical importance of agriculture to the economy but it also reflects economists early and continued interest in quantifying the rate of return to society s sizable investment in agricultural r d the sum of government sponsored and private sector r d investment in agriculture is estimated to have been 268 million in 1953 in that year total r d investment in the economy from all sources amounted to 5 1 billion 2 excluding defense and space related r d which accounted for approximately half of the u s total in the early fifties 3 r d expenditures dedicated to agriculture equaled approximately 10 of total u s investment in r d from all sources

new growth accounting this article opens the black box of total factor productivity by decomposing this all in one index into various input embedded and input free productivities in a new growth accounting framework the new method identifies different channels through which growth drivers affect economic growth and finds the most effective way to boost the economy which is unidentified in standard method this new approach uses a varying coefficient stochastic frontier model which integrates the standpoints of the endogenous growth theory and the induced innovation theory into a reduced form productivity analysis the new growth accounting is then applied to study the impacts and contributions of r d investments international trade and structural transformation to world agricultural growth during the period of 1962 to 2014 the empirical results provide new evidence to support the endogenous growth theory and the induced innovation theory indicating the necessity of using the new growth accounting method

the effect of intellectual property rights on agricultural productivity this article explores how the strengthening of intellectual property ip protection affects agricultural productivity in a panel of countries for the period 1961 2011 using an index of ip protection for plant varieties we study the effect of stronger intellectual property rights iprs on cereal yields and two different types of cereals open pollinated wheat and hybrid maize we found that the strengthening of iprs has a positive effect on productivity of cereals for high and low income countries however we found no significant effect for middle income countries in addition we found that becoming a member of the trade related aspects of intellectual property rights negatively affects cereal yields finally we found evidence of the existence of nonlinearities in the effect of iprs on agricultural yields which confirms a threshold effect of iprs that also varies for countries of different income level the findings support the hypothesis that country specificities are important in determining the effect of iprs and imply that there is no unique system that fits all

mechanization in ghana emerging demand and the search for alternative supply models influential studies in the 1980s and early 1990s drew on the boserup ruthenberg theories of farming systems evolution to argue that african countries were not yet ready for widespread agricultural mechanization through applying the theories of farming systems evolution and of induced innovation in technical change this paper shows that demand for certain mechanized farming operations particularly plowing has emerged even among smallholders suggesting that supply issues may now be the main constraint to successful mechanization we therefore adopt a supply chain approach to analyze two types of mechanization practices in ghana i e a recent state led mechanization program and the private sector led service hiring market against an international perspective by drawing on three asian supply models we identify two major flaws in existing policies first the agricultural mechanization service centers that the government promotes fail to use tractors services with sufficient intensity second direct importation of agricultural machinery by the government inhibits imports of appropriate and affordable machinery in contrast the development of mechanized service hiring market in which medium and large scale farmers who are tractor owners provide hiring out services to small scale farmers represents a promising model for sustainable mechanization in ghana this private sector led second model is consistent with international experiences

social network structure and status competition in status competition studies the utility of heterogeneous individuals typically depends on an economy wide average indicator of status in our model emulative and jealous agents are embedded in an exogenous network where agent specific reference group is determined by the direct link emanating from the agent similarly to ghiglino and goyal 2010 but in a somewhat different framework we show that individual consumption is proportional to the agent s outbound katz bonacich network centrality measure and equilibrium is generally inefficient more important the negative externality associated with each agent depends on her inbound centrality measure the conspicuousness index a tax based on this index combined with a uniform lump sum transfer attains efficiency

the intercountry agricultural production function and productivity differences among countries abstract the sources of differences in labor productivity in agriculture between developed countries dc s and less developed countries ldc s are identified by estimating an aggregate agricultural production function based on cross county data for 1960 1970 and 1980 the production function was found to be stable over the entire period agriculture in the dc s was characterized by increasing returns and in the ldc s by constant returns to scale the results imply that unfavorable man land ratios do not represent an immediate barrier to rapid agricultural development in the low income ldc s but they may create a serious agricultural adjustment problem as those countries advance into the middle income range

the long run impact of biofuels on food prices more than 40 of us corn is now used to produce biofuels which are used as substitutes for gasoline in transportation biofuels have been blamed universally for past increases in world food prices and many studies have shown that these energy mandates in the us and eu may have a large 30 60 impact on food prices in this paper we use a partial equilibrium framework to show that demand side effects in the form of population growth and income driven preferences for meat and dairy products rather than cereals may play as much of a role in raising food prices as biofuel policy by specifying a ricardian model with differential land quality we find that a significant amount of new land will be converted to farming which is likely to cause a modest increase in food prices however biofuels may increase aggregate world carbon emissions due to leakage from lower oil prices and conversion of pasture and forest land for farming

dominance and competition we propose and test two possible explanations of envy and its opposite gloating one explanation views them as a learning process just as regret and rejoice are in the private domain envy is the social correspondent of regret the other explanation traces envy back to the natural tendency of individuals to seek higher positions in the social ranking that is a dominant position a tendency with very strong evolutionary motives we show experimentally that these two functional reasons for envy coexist competition is the product of the desire for dominance rather than the artificial output of social arrangements jel d12 d87

cross country disparity in agricultural productivity quantifying the role of modern seed adoption inequality of agricultural labour productivity across the developing world has increased substantially over the past 40 years this article asks to what extent did the diffusion of green revolution seed varieties contribute to increasing agricultural labour productivity disparity across the developing countries we find that 22 per cent of cross country variation in agricultural labour productivity can be attributed to the diffusion of high yielding seed varieties across countries and that the impact of such diffusion differed significantly across regions we discuss the implications of these findings for policy directed at increasing agricultural labour productivity in the developing world

asymmetric stationarity in national stock market indices an mtar analysis a procedure is developed using a momentum threshold autoregressive model and asymmetric stationarity tests designed to identify periods of asymmetric stationary divergences from nonstationary paths in time series and is applied to major national stock indices the results reveal the existence of asymmetric stationary periods in each of these indices these results suggest an explanation for the counterintuitive positive forecasting results of technical traders for various time periods we explore this possibility further by using a representative moving average technical trading strategy and find significantly different results higher returns when information from the procedure is incorporated into a trading rule

resource saving and productivity enhancing impacts of crop management innovation packages in ethiopia crop management innovations are often not discrete fixed stand alone options and their adoption may imply various combinations and adaptations this potentially confounds their impact assessment this article assesses the resource saving and productivity enhancing impacts of a crop management package revolving around minimum tillage in maize based farming systems in northwest ethiopia an endogenous switching regression model was applied to plot and household level survey data collected from 290 rural households operating 590 maize plots during the 2012 production year controlling for variations in plot and household characteristics the average effect of minimum tillage package minimum tillage package on maize productivity is 0 44 t ha compared to conventional practice cp adoption of the mtp decreased the average male and female labor use in maize production by 14 4 and 8 2 person days per ha respectively similarly mtp adoption decreased draft power use for land preparation by 13 2 pair of oxen days per ha compared to cp in general there is a considerable short run maize productivity gain and reduction in labor and draft power use under mtp

on interdependent supergames multimarket contact concavity and collusion abstract following bernheim and whinston 1990 this paper addresses the effects of multimarket contact on firms ability to collude real world imperfections tend to make firms objective function strictly concave and market supergames interdependent firms payoffs in each market depend on how they are doing in others then multimarket contact always facilitates collusion it may even make collusion sustainable in all markets when otherwise it would not be sustainable in any the effects of conglomeration are discussed multigame contact is shown to facilitate cooperation in supergames other than oligopolies as long as agents objective function is submodular in material payoffs journal of economic literature classification numbers c72 d43 l13 l21

agricultural productivity in developing countries abstract this paper examines changes in agricultural productivity in 18 developing countries over the period 1961 1985 we use a nonparametric output based malmquist index and a parametric variable coefficients cobb douglas production function to examine whether our estimates confirm results from other studies that have indicated declining agricultural productivity in ldcs the results confirm previous findings indicating that at least half of these countries have experienced productivity declines in agriculture

implicit contracts and the explanatory power of top executive compensation for future performance recent research suggests that implicit incentive contracts may be based on performance measures that are observable only to the contracting parties we derive and test implications of this insight for the relationship between executive compensation and firm performance if corporate boards optimally use both observable and unobservable to outsiders measures of executive performance and the unobservable measures are correlated with future firm performance then unexplained variation in current compensation should predict future variation in firm performance further compensation should be more positively associated with future performance when observable measures are less useful for contracting our results are consistent with these hypotheses

non discretionary conservatism evidence and implications a large body of accounting research finds that various contracting incentives lead managers to engage in conservative accounting practices we extend existing research by modeling the impact of extant accounting rules on conservative accounting accounting rules typically require assets to be written down when their fair values drop sufficiently below their book values we document evidence of the resulting non discretionary conservatism and show that it appears to explain some of the results from previous research on contracting incentives

long term crop productivity response and its interaction with cereal markets and energy prices abstract crop yields are endogenous as long as economic agents adjust to permanent changes in expected prices the literature however does not offer a definitive value of how much yield would change in response to sustained price changes to fill the gap we use available scientific findings and data to estimate yield elasticities that enable agricultural commodity and food policy analysis using a world market model with short to long run yield response we show the impacts of sustained energy price shocks on global cereal supply and demand the results highlight substantial differences in quantity and price effects depending on the yield elasticities these results demonstrate the need to recognize yield response when assessing impacts of energy prices or biofuel production on food uses or more generally on food security in the face of income and population growth evolving dietary patterns climate change implications or other long run pressures

u s agricultural research deflators 1890 1985 abstract using newly developed time series on u s public sector agricultural research expenditures two new deflators for agricultural research are constructed these deflators differ from others currently used in the literature in that factor level price indices are weighted with time varying weights which capture the shifting factor mix of research spending by the state agricultural experiment station saes the substantial differences in measuring real resource allocation to agricultural research using these deflators and alternatives found in the literature including that used by the national science foundation to report official r d statistics are demonstrated in addition the factor level expenditure series are used to contrast measurement of resource allocation in agricultural research from 1890 to the present using real research service flows as opposed to real research expenditures

productivity growth technical progress and efficiency change in industrialized countries this paper analyzes productivity growth in 17 oecd countries over the period 1979 1988 a nonparametric programming method activity analysis is used to compute malmquist productivity indexes these are decomposed into two component measures namely technical change and efficiency change we find that u s productivity growth is slightly higher than average all of which is due to technical change japan s productivity growth is the highest in the sample with almost half due to efficiency change jel c43 d24 in this paper we apply recently developed

additional evidence on bonus plans and income management abstract we extend healy 1985 by examining the relation between discretionary accruals and bonus plan bounds for a sample of 102 firms for the 1980 1990 period contrary to healy we find that when earnings before discretionary accruals fall below the lower bound managers select income increasing discretionary accruals and vice versa we believe that our results are more consistent with the income smoothing hypothesis than with healy s bonus hypothesis however mechanical selection bias in portfolio formation cannot be entirely ruled out as an alternative explanation for our results

competitiveness and technical efficiency determinants in the groundnut oil sector of india india imports about half of its domestic consumption needs of edible oils groundnuts are a major source of edible oils in india one of the central problems of groundnut production and processing is huge inefficiencies due to an uncertain production environment owing to rainfed cultivation the low resource base of smallholder farmers and processors and the low adoption rates of improved technology this paper addresses critical issues that impair the groundnut sector s international competitiveness and efficiency the paper uses primary data collected from indian farmers and processors of groundnuts to measure efficiency and it suggests policies for reducing yield gaps and increasing efficiency specific policies suggested from the study are a the harnessing of improved varieties with attributes like drought tolerance high oil content high productivity for large scale seed multiplication and distribution by public and private agencies b viable village seed banks and seed networks through cycles of post rainy season seed multiplication to meet the seed requirements in the rainy season and vice versa c adoption of low cost technologies to increase profitability and reduce risk d oilseed clusters to facilitate scale and scope economies in processing units and e capital subsidies to accelerate technological upgrading to shed inefficiency in the processing sector the expected gains in efficiency in the production and processing of oilseeds are expected to result in producer and consumer gains which would justify the proposed incentives for seeds and for technological upgrading in the processing sector

smoothing income in anticipation of future earnings abstract recent theory argues that concern about job security creates an incentive for managers to smooth earnings in consideration of both current and future relative performance we find support for this theory our evidence suggests that when current earnings are poor and expected future earnings are good managers borrow earnings from the future for use in the current period conversely when current earnings are good and expected future earnings are poor managers save current earnings for possible use in the future however sensitivity analysis indicates that we cannot rule out selection bias as a potential alternative explanation for our findings

an explanation for accounting income smoothing it is widely believed that corporate managers often engage in income smoothing taking actions to dampen fluctuations in their firms publicly reported net income one reason given for this is that managers think that investors pay more for a firm with a smoother income stream see ronen and sadan 1981 while there have been many empirical studies attempting to document whether or not income smoothing actually occurs there has been little exploration of why a manager might rationally want to smooth his firm s income explaining why smoothing might be observed and how it can result in an increased stock price is the focus of this paper in two recent studies lambert 1984 and dye 1988 demonstrate in agency settings that a risk averse manager who is precluded from borrowing and lending in the capital markets has an incentive to smooth his firm s reported income in this paper in contrast it is shown that within a market setting an incentive exists for a manager to smooth income that is independent of either risk aversion or restricted access to capital markets the market setting is also useful in that it allows for the analysis of the effect of income smoothing on stock prices it is shown here that if a manager can choose which of two periods to recognize certain income he may prefer the choice that is expected to

the optimal shape of compensation contracts with earnings management the research question of why earnings management occurs is decomposed into two questions in this article which component of executive compensation generates incentives for earnings management and why is the compensation structured that way in the first place we first use as a dynamic stochastic equilibrium model to show that big bath and earning overstatement can co exist as equilibrium financial reporting strategies when thresholds are used in compensation contracts in order to understand the use of performance thresholds as a prevailing compensation strategy in practice we then derive the optimal compensation contract when the manager is privately informed about economic earnings and his expertise in managing earnings equilibria exist in which the inactive region below a threshold in compensation should be economically significant