the role of capital and labour in shaping the environmental effects of fiscal stimulus abstract although the macroeconomic consequences of short term fiscal stimulation packages have been thoroughly analysed in the literature still relatively little is known about their environmental effects we discuss an important channel through which short run expansionary fiscal policy influences greenhouse gas emissions we show that fiscal policy exerts its impact not only by increasing general level of economic activity but also by changing the composition of factors of production capital and labour using the dynamic stochastic general equilibrium model of economy we demonstrate that fiscal expansion results in a shift from capital intensive to more labour intensive technologies our panel study proves that the latter tends to be associated with lower emissions of greenhouse gases per unit of production hence our analysis demonstrates that an extensive use of fiscal stimulus during recessions can significantly reduce the environmental burden of the additional units of gdp

dispersed knowledge and an entrepreneurial theory of the firm in this article we propose an entrepreneurial theory of the firm that is based on dispersed knowledge we argue that the dispersion of knowledge over people and places and over time leads to uncertainty this uncertainty combined with heterogeneous expectations and the nexus of an individual and opportunity explains the emergence of new firms we then suggest that the theory of the firm proposed by us answers questions that have been overlooked by alternative theories the specific question we discuss in this article is when and why an entrepreneurial opportunity will be taken to market through an existing firm and when and why a new firm will be chosen as a vehicle for taking a new idea to market i e whether the residual will be concentrated in an existing or in a new firm d 2003 published by elsevier inc

short run exchange rate uncertainty in latin america this paper to obtain an ex ante measure of exchange rate uncertainty in 11 latin american countries as a preliminary issue the purchasing power parity ppp condition is tested using engle and granger two step procedure and johansen method the argument is that exchange rate uncertainty could be lower if ppp holds in the long run the expected exchange rate uncertainty is estimated according to an extended version of the autoregressive conditionally heteroscedastic arch model the results show that the arch adjusment produces more efficient estimates in seven countries and that the acceptance of ppp has little effect on exchange rate uncertainty

property rights externalities and resource degradation locating the tragedy abstract resource degradation in the third world is largely driven by the demands of farm households for fuelwood and land for agriculture since resources are often controlled through indigenous systems of property the tragedy of the commons has been used to explain resource degradation as a result private property is suggested as a solution to resource degradation a dynamic model capable of examining household incentives for resource use under private and common property is developed results of the model reject the conventional wisdom that gives rise to the presumed optimality of private individual property in natural resources and the correlated indictment of group management regimes

effects of public and private expenditures on environmental pollution a dynamic heterogeneous panel data analysis abstract this paper examined the impact of expenditures of household firm and government on aggregate and sectoral carbon emissions in the world economies during 1990 2015 the modified heterogeneous panel data technique was used to estimate both carbon emission and income models from which both the direct and indirect effects of expenditure categories were estimated along with long run and short run analyses empirical results indicate that in the long run the negative direct effect of government expenditure was reduced by the positive indirect effects leading to positive total effect on aggregate carbon emission however in the short run the negative direct effect was enhanced by the negative indirect effect culminating into negative total effect further in the long run the positive direct effect of investment expenditure was reduced by the negative indirect effects resulting into negative total effect on aggregate carbon emissions however the negative short run direct effect was reduced by the positive indirect effect leading to marginal positive total effect the total direct effect of household consumption spending was negative in the long run and could be relatively large in the short run the effect of the household expenditure on sectoral carbon emissions was negative while that of private investment was positive and that of public spending was diverse the policy lessons include the need to conduct value chain environmental pollution implications of any expenditure policy

governance and deforestation a meta analysis in economics abstract understanding which aspects of forest governance have the potential to effectively reduce deforestation is central to reversing trends in global deforestation there is a multitude of empirical studies examining this relationship using various measures of governance and study designs coming to diverse conclusions in order to identify the source of variation across studies this article conducts a meta analysis of 32 empirical cross country studies in the field of economics containing 227 estimates of the impact of different governance measures on deforestation using an ordered probit model we find that the choice of the governance measure is the main factor in explaining variations in the outcomes of the studies in particular studies using environmental policy ownership rights presence of environmental ngos and rule of law as measures of governance are more likely to find that better governance reduces deforestation in contrast studies using democracy and rights as a measure of governance are more likely to find that deforestation increases when governance is improved the finding that not all aspects of governance improvements are equally supportive of forest conservation suggests that more nuanced analyses of specific aspects of environmental governance are required to guide evidence based policy making

on fuelwood consumption population dynamics and deforestation in africa abstract as the literature on fuelwood in africa has increased in quality in recent times it has become evident that generalizations about africa s fuelwood crisis need to be treated with great caution as a consequence some commonly held or orthodox beliefs may now need to be reexamined this paper subjects three such beliefs 1 the existence of a linear relationship between population growth fuelwood consumption and rates of fuelwood induced deforestation 2 that fuelwood induced deforestation approximates ripples spreading outward from urban consuming centers and 3 that land conversion to agriculture always reduces fuelwood supplies to close scrutiny the second and third assumptions are analyzed in the light of recently collected field data in the kano area of northern nigeria while the examination of the first is based on a reinterpretation of information from a wider range of invironments the paper concludes that although available data are inadequate for definitive conclusions to be drawn on the first count it seems likely that variations arising out of demographic differentials in urban populations in particular changes in per capita fuelwood consumption resulting from changes in consuming unit size distort direct links between population growth rates and rates of increase in fuel consumption further information on the demographic characteristics of african towns is needed for meaningful analyses of temporal changes in the affected variables to be undertaken the second and third assumptions are found to be inapplicable in the kano case howe1ver this should be interpreted much less as justification for their outright rejection than as a reminder of the great potential of time and space specific considerations for rendering universal rules locally inapplicable

analysis of uncertainty as opposed to risk an experimental approach the paper illustrates the scope for enhancing the conceptual apparatus used by agricultural economists to analyse decision making under conditions of uncertainty selected empirical results from experiments on student subjects from three universities are reported three issues are considered first the reasons for choice and the understanding of a choice problem are examined second attitudes towards different levels of uncertainty are measured third the possibility that apparently non normative psychological factors influence choice is explored the paper serves to illustrate and support a number of methodological points the major points are that a risk uncertainty distinction is useful contrary to the aging conventional wisdom of economic theory that laboratory experiments can potentially provide data of use to agricultural economists and that predictive models of choice under uncertainty may be more accurate if they take account of psychological variables which influence the decision making processes of human subjects

rational behavior and economic theory abstract nowadays it seems almost universally presumed that the fundamental characteristic of homo oeconomicus is his rationality we analyze the role played by the concept of rationality in economic theory and demonstrate that it is necessarily constrained to be an essentially contentless notion we show that the main body of economic theory is firmly grounded and that some contrasting approaches to rationality although leading to heated debates and vivid confusion have no fundamental significance for economics with a refereshed view on the essence of economics we argue that the principles of economic theory form an essential methodological guide for the emergent line of research based on the use of so called evolutive models

environmental externalities in traditional agriculture and the impact of trade liberalization the case of ghana abstract this paper provides a framework for the evaluation of trade policies that explicitly considers the effects of such policies on the environmental resources biomass in doing this we estimate the effects of biomass as a factor of agricultural production and test the hypothesis that farmers efficiently exploit biomass a resource held in common property the main findings are i biomass is an important factor of production in ghanian agriculture ii the biomass resource is exploited beyond the socially optimal level iii a deepening of trade liberalization is likely to induce further losses of biomass and deforestation and iv national income is likely to fall in response to further trade liberalization

brazilian policies that encourage deforestation in the amazon this paper shows that general tax policies special tax incentives the rules of land allocation and the agricultural credit system all accelerate deforestation in the amazon these policies increase the size of land holdings and reduce the chances of the poor to become farmers the following are the key provisions i the virtual exemption of agricultural income from income taxation makes agriculture a tax shelter ii rules of public land allocation provide incentives for deforestation because the rules used in determining the security of a claim and its land area encourage land clearing iii the progressive land tax contains provisions that encourage the conversion of forest to crop land or pasture iv the tax credit scheme aimed toward corporate livestock ranches subsidizes inefficient ranches established on cleared forest land and v subsidized credit is available for sudam approved ranches

an optimal path to extinction poverty and resource degradation in the open agrarian economy this paper constructs a model of the open agrarian economy in order to explore the tendency of many such economies to evolve along paths characterised by severe environmental degradation it pays special attention to the importance of commodity prices and the transfer system in determining agricultural activity levels in ecologically delicate systems

knight on risk and uncertainty it is argued that the received interpretation of knight s classic riskuncertainty distinction as concerning whether or not agents have subjective probabilities constitutes a misreading of knight on the contrary knight shared the modern view that agents can be assumed always to act as if they have subjective probabilities we document our contention that by uncertainty knight instead meant situations in which insurance markets collapse because of moral hazard or adverse selection knight s discussion of market failure although always informal and in places inaccurate was in many respects a remarkable anticipation of the modern literature

mortgage valuation under optimal prepayment mortgage originators offer borrowers various combinations of points loan fees and coupon high points and low coupon or low points and high coupon in this article points are interpreted as a device serving to separate borrowers with high prepayment probabilities from those with low prepayment probabilities borrowers and lenders are treated symmetrically both are risk neutral and both have complete and frictionless access to credit markets implying that borrowers can finance points if they wish except that borrowers prepayment speeds are private knowledge equilibria are derived both when borrowers cannot prepay voluntarily and when they can article published by oxford university press on behalf of the society for financial studies in its journal the review of financial studies

pasture conversion and competitive cattle rents in the amazon the economic incentives for conversion to pasture in mato grosso brazil are investigated using pastureland rents pastureland rents are estimated from physical and geographic determinants and verified by predicting the location of conversion to pasture between 2001 and 2004 results indicate that a one hundred dollar increase in mean cattle rent increases the probability of conversion to pasture from 8 6 to 11 1 the use of economic rent allows the direct study of fiscal policy levers on land conversion behavior expanding policy discussions beyond the role of roads and road improvement towards the use of excise and conversion taxes or conservation subsidies

exchange rate uncertainty and foreign trade abstract this paper starts with reviewing the existing literature on exchange rate uncertainty and trade flows it then argues that potential costs of medium term uncertainty in exchange rates and competitiveness are likely to be much larger than that of exchange risk which has been the focus of the existing literature two measures of medium term exchange rate uncertainty are constructed one is a weighted function of the magnitude of past movements in nominal exchange rates and the current deviation of the exchange rate from equilibrium while the second depends on both the duration and the amplitude of misalignment from equilibrium exchange rates the empirical evidence reported in the paper suggests that when exchange rate uncertainty is defined over a medium term period it does affect adversely trade flows of the industrial countries under review with the notable exception of the united states

clarifying frank knight s discussion of the meaning of risk and uncertainty frank knight s 1921 famous distinction between risk and uncertainty has entered the jargon of economics and decision theory yet it appears to have gone unnoticed that his formulation suffers from an elementary confusion this note locates the source of the problem and proposes a reformulation that avoids it it is safe to say that frank knight 1921 is more widely quoted than read on his epony mous distinction between risk and uncertainty this of course is a fate that befalls many authorities and at least in the present case is probably not particularly serious for the knightian distinction has acquired a currency of its own that is both reasonably unambiguous and relatively widely understood certainly the convention of using the term risk to describe decision situations in which probabilities are available to guide choice and uncertainty to describe decision situations in which information is too imprecise to be summarised by probabilities is deeply ingrained in both economic theory and decision theory 1 that said and as those who are familiar with it will know the long disquisition on the meaning of risk and uncertainty that appears in chapter 7 of knight s risk uncertainty and profit is well worth reading 2 not only is his categorisation of different kinds of probability situation a good deal more subtle than the simple risk uncertainty dichotomy might imply he also has many interesting things to say about induction social laws the metaphysics of chance and the psychology of decision making under uncertainty in view of the many positive aspects of knight s discussion then not to mention how often it continues to be invoked it is particularly unfortunate that it turns out to suffer from an elementary confusion the purpose of what follows is to locate the source of this confusion and to propose a reformulation of knight s position that avoids it the hope is that readers may then be able to benefit from the many insights in knight s discussion

is there an environmental kuznets curve for deforestation abstract this paper examines the relationship between deforestation and gross domestic product gdp per capita in particular whether an inverted u relationship indicative of worsening then improving deforestation exists between them we note that previous work has used models with restrictive assumptions and recommend a more flexible random coefficients specification which allows for a greater degree of cross country heterogeneity empirical results using data for 76 developing countries between 1961 1992 suggest that the inverted u shaped relationship observed in other studies does not appear to be an empirical regularity with our less restrictive specification statistical tests indicate that this specification is supported by the data we argue that such results are not surprising in view of the wide diversity of physical and social characteristics that exist across countries

the interaction of population growth and environmental quality an important question for policy is whether holding constant per capita income and other relevant factors population pressures have a significant effect upon environmental degradation the authors examine the effect of population pressures upon deforestation in 64 developing countries in an attempt to provide relevant empirical findings data on deforestation were drawn from the food and agriculture organizations production yearbook results suggest that a relationship exists between per capita income and deforestation and that for africa rural population density shifts the relationship upward the increase in the rate of deforestation levels off as income increases the rate of growth in per capita income also has a significant negative impact upon deforestation although the magnitude of the effect is small the authors close in stressing that reducing the rate of population growth is not necessarily the best way to reduce the rate of deforestation deforestation in developing countries is really a problem of market failure since property rights are often neither defined nor enforced there is essentially no private cost of deforestation with no long term stake in the land people have no incentive to use land efficiently this situation must be addressed in conjunction with the problems of poverty and population growth

deforestation and seigniorage in developing countries a tradeoff abstract most of countries covered by natural forests are developing countries with limited ability to levy taxes and restrained access to international credit markets consequently they are amenable to draw heavily on two sources of government financing namely seigniorage and deforestation revenues first we develop a theoretical model emphasizing a substitution effect between seigniorage and deforestation revenues second a panel data econometric analysis over the 1990 2010 period confirms our findings consequently a tighter monetary policy hastens deforestation third we extend the theoretical model and show that international transfers dedicated to forest protection can upturn the positive link between tighter monetary policies and deforestation and then discuss the relevance of this finding with respect to recent institutional arrangements

environment and development theory and international evidence the environmental effects of economic development have significant implications for a wide array of policy questions facing both low and high income countries today internationally agricultural research centers are considering how to incorporate sustainability issues into their research agendas while international lending institutions are taking a close look at the environmental consequences of industrial projects domestically the north american free trade agreement has brought the relationship between economic development and environmental quality to the forefront of u s public policy debate it is surprising that despite the postwar growth of development economics the genesis of environmental economics and the fusion of ideas from both fields into the theme of sustainable development economists have not made much progress in describing the impacts of long term economic growth on environmental quality yet a vigorous public debate has arisen between individuals who maintain that environmental degradation is a necessary outcome of economic growth and those who believe that economic growth and environmental quality go hand in hand this debate was highlighted at the 1992 united nations conference on environment and development in rio de janeiro in part this debate hinges on the properties of the aggregate demand for and supply of environmental quality if the income elasticity of demand for environmental quality or amenities is high then the increased prosperity engendered by economic growth could lead to significantly higher demand for environmental quality proponents of economic growth believe this demand will translate into a higher realized level of quality as both public and private institutions and organi

allocating resources in an uncertain world water management and endangered species instream flows may be essential in protecting aquatic species that are threatened or endangered an economic model of the optimal allocation of water under pure uncertainty is developed with particular attention paid to the situation when a species characterized by critical depensation is affected by instream flows we adopt the notion of pure uncertainty that frank knight and daniel ellsberg intended which applies when decision makers cannot reduce their uncertainty to a unique probability distribution following recent work by hansen sargent and others we employ robust control as a way to deal with this problem copyright 2008 oxford university press

changing political regimes and tropical deforestation expansion of agriculture is a main cause of tropical deforestation government policies and weak property rights contribute to this process by encouraging landowners and landless to accelerate land clearing using panel data common to previous studies we add the dimension of new political regimes democratic and non democratic and investigate how the rate of agricultural land expansion in tropical countries depends on the nature and persistence of each regime we find that both new autocratic and democratic regimes have accelerated the expansion of agricultural land thus yielding support to some of the findings in the earlier literature interesting differences emerge between regions with the impact being most pronounced in latin america we interpret these results mainly in the context of increasing tenure and ownership insecurity which in turn is driven by the tendency of new regimes to implement land reforms as a form of social and economic policy or voter payback the argument is developed more formally using a simple competitive land use model that incorporates political regime dependent confiscation risk and agricultural subsidy policy

considering the effect of biomass energy consumption on economic growth fresh evidence from brics region abstract this paper investigates the relationship between biomass energy consumption and economic growth by incorporating capital and trade openness in production function for the case of brics countries in doing so unit root and cointegration tests have been used in order to examine unit root properties and long run relationship between the series for the period of 1991q1 2015q4 the results confirm the presence of long run equilibrium relationship between the variables moreover biomass energy consumption stimulates economic growth capital increments economic growth and trade openness spurs economic growth the feedback effect exists between biomass energy consumption and economic growth trade openness granger causes economic growth capital and biomass energy consumption the policy to adopt biomass as the primary source of renewable energy helps brics countries to achieve sustainable development goal in both short run and long run however the key innovative point of this study is to establish the sign for granger causality test

the economics of tropical forest land use options tropical deforestation is generally characterized as conversion of forest land to alternative uses notably agriculture this would suggest the need for rational decision making concerning the optimal allocation of tropical forest land between competing uses the following paper explores this problem by devising rules for determining optimal land use allocation between timber and agriculture at the stand and forest levels a complementary intertemporal model for optimal allocation of forest land to agricultural conversion at the forest level is also developed and used to derive a demand relationship for agricultural conversion which is then approximated through empirical estimation

the effects of government spending on deforestation due to agricultural land expansion and co2 related emissions this paper examines the effect of changes in government spending level and composition on deforestation due to agricultural land expansion and related carbon dioxide emissions our theoretical model shows an unintended consequence from increased government spending and widening social safety nets in developing countries where agricultural land expansion significantly affects forest cover there is an increase in deforestation and carbon dioxide emissions from land use change our empirical tests show that an increase in total government spending significantly increases forest land clearing for agricultural production in the short run leading to more carbon dioxide emissions however there is no long run statistically significant effect on the steady state forest cover and carbon dioxide emissions

determinants of deforestation and the economics of protection an application to mexico we estimate the probability of deforestation at the plot level for chiapas and oaxaca two poor mexican states with high levels of biodiversity results highlight the importance of physio geographic endowments as well as policy variables and allow to test explicitly for aggregation bias they also suggest that if combined with information on the biodiversity value of specific plots such models could be of great relevance for policy by allowing to identify the ex ante risk of deforestation copyright 2002 oxford university press

should governments stop subsidies to private goods evidence from rural latin america abstract this paper empirically documents the effects of subsidizing private goods to the detriment of the government s supply of public goods we use a new data set from the rural sector in fifteen latin american countries over the period 1985 2001 collected using a methodology that allows us to separate government subsidies to private goods from expenditures in the provision of public goods the econometric evidence shows that the government s decision to subsidize either private or public goods has dramatic consequences for economic development reducing the share of subsidies to private goods or equivalently increasing the share of public goods in the government s budget has ceteris paribus a large and significant positive impact on rural per capita income reduces certain undesirable environmental effects associated with output expansion and contributes to poverty reduction

why has europe become environmentally cleaner decomposing the roles of fiscal trade and environmental policies this paper examines the role of fiscal policy trade and energy taxes on environmental quality in europe using disaggregated data at the monitoring station level for the 12 richest european countries spanning the period from 1995 to 2008 our estimations show that fiscal policies and energy taxes are important determinants of pollution through various mechanisms we find that increasing the share of fiscal spending in gdp and shifting the emphasis towards spending in public goods and against non social subsidies significantly lower the concentrations of sulfur dioxide and ozone but not nitrogen dioxide at the same time energy taxes reduce nitrogen dioxide concentrations but have no effect on ozone and sulfur dioxide finally trade openness has a direct effect on sulfur dioxide but no effect on nitrogen dioxide or ozone our estimates account for time varying unobserved heterogeneity

the effect of government expenditure on the environment an empirical investigation abstract this paper examines the impact of government spending on the environment using a panel of 77 countries for the time period 1980 2000 we estimate both the direct and indirect effects of government spending on pollution the indirect effect in particular operates through the impact of government spending on income and the subsequent effect of the income level on pollution to take into account the dynamic nature and the potential endogeneity in the relationships examined appropriate econometric methods are used for so2 government spending is estimated to have a negative direct impact on per capita emissions while the direct effect is insignificant on co2 pollution the indirect effect on so2 is negative for low income levels and becomes positive as income increases while it remains negative for co2 for the most part of the sample range the resultant total effects follow the patterns of the indirect effects which dominate their respective direct ones for each pollutant policy implications from the results vary depending on the income level of the considered countries

green public procurement of certified wood spatial leverage effect and welfare implications certified and conventional products are not traditional substitute goods green public procurement stimulates certification globally but not in each region public procurement of the cheaper unsustainable product does not maximise welfare increasing the price premium for certified wood creates a trade barrier the high costs of forest certification exclude vulnerable producers

factor demand under conditions of product demand and supply uncertainty the paper develops a theory of factor demand under uncertainty that encompasses neo classical factor demand and keynesian effective factor demand as special cases the model allows factor demand and output to move positively with product demand even with a constant product price this in turn permits real wages to move pro cyclically in response to product demand shocks in addition the model provides a new perspective on the adding up problem which posits that total factor payments exceed output if increasing returns to scale exist and generates positive uncertainty profits that are similar in spirit to those of frank knight

the impact of farm animal housing restrictions on egg prices consumer welfare and production in california new animal welfare policies on the horizon in many u s states have prompted debates about the cost of achieving happier hens and hogs a recent policy change in california offers a unique opportunity to measure the economic repercussions of minimum space requirements for egg laying hens using forecasting methods and structural break tests as applied to sixteen years of monthly data on egg production and input prices we find that by july 2016 both egg production and the number of egg laying hens were about 35 lower than they would have been in the absence of the new regulations out of state eggs were able to compensate for falling california production until around the time the new rules were implemented at which point imports of eggs into california fell for consumers we estimate price impacts using panel structural break tests and difference in differences models as applied to five years of scanner data from the retail market for shell eggs in three california markets and three control markets we find that the average price paid per dozen eggs was about 22 higher from december 2014 through september 2016 than it would have been in the absence of the hen housing restrictions the price impact fell over time from an initial impact of about 33 per dozen to about 9 over the last six months of the observed time horizon these price increases correspond to welfare losses of at least 117 million for the three california markets over the observed time horizon our results suggest that because of the policy change california consumers can expect to experience annual welfare losses of at least 25 million in future years from higher retail egg prices alone

the mercantilist index of trade policy we introduce an index of trade policy restrictiveness defined as the uniform tariff that maintains the same trade volume as a given tariff quota structure our index overcomes the problems of the trade weighted average tariff it avoids substitution bias correctly accounts for general equilibrium transfers and takes import volume instead of welfare as benchmark empirical applications to international cross section and time series comparisons of trade policy confirm our theoretical results trade weighted average tariffs generally underestimate the true height of tariffs as measured by the trade volume equivalent index this in turn always underestimates the welfare equivalent index

international timber markets and tropical deforestation the evidence from prices some scholars suggest that global timber markets especially those involving high value species are a leading cause of tropical deforestation despite limited empirical evidence this hypothesis rests on the assumption that global timber markets respond to a common equilibrating mechanism that provides strong enough incentives for loggers in the tropical regions of the world this article develops a simple model and taps into a unique data set on timber prices of hardwood and softwood in leading markets to test the global timber markets hypothesis while we find evidence of a global equilibrating mechanism with potentially significant economic incentives to affect tropical deforestation our results do not endorse the common conjecture in the literature that timber price shocks in developed countries lead to a homogeneous response in terms of deforestation everywhere in the tropical world instead they invite further development of structural global timber market models to assess the linkages between ma

trade policies economic growth and the direct causes of deforestation by ramon lopez gregmar i galinato please send correspondence to ramon lopez 2200 symons hall university of maryland college park md 20742 email rlopez arec umd edu tel 301 405 1281 fax 301 314 9091 gregmar i galinato 2200 symons hall university of maryland college park md 20742 email ggalinato arec umd edu tel 301 405 0477 fax 301 314 9091

dual economic growth in poor tropical areas abstract we consider a two sector model a modern sector and an extensive one with the extensive sector being highly dependent on natural vegetation cover as a factor of production in the extensive sector land tenure is not well defined we show that taxing the extensive sector as a whole and land intensive crops relative to labor intensive crops increases real income consumption in the short run however necessarily falls the cost of the adjustment is paid mostly by the poor when the extensive sector as a whole is taxed the distributional consequences of taxing the land intensive outputs however are ambiguous

keynes meets markowitz the trade off between familiarity and diversification we develop a model of portfolio choice to nest the views of keynes who advocates concentration in a few familiar assets and markowitz who advocates diversification we use the concepts of ambiguity and ambiguity aversion to formalize the idea of an investor s familiarity toward assets the model shows that for any given level of expected returns the optimal portfolio depends on two quantities relative ambiguity across assets and the standard deviation of the expected return estimate for each asset if both quantities are low then the optimal portfolio consists of a mix of familiar and unfamiliar assets moreover an increase in correlation between assets causes an investor to increase concentration in familiar assets flight to familiarity alternatively if both quantities are high then the optimal portfolio contains only the familiar asset s as keynes would have advocated in the extreme case in which both quantities are very high no risky asset is held nonparticipation this paper was accepted by brad barber teck ho and terrance odean special issue editors

on the gains of committing to inefficient production lobbying and low land productivity in latin america abstract we present a new explanation and empirical evidence showing that rural subsidies to large farmers tend to be associated with low land productivity and excessive deforestation we develop a lobbying model where wealthy farmers trade bribes or political contributions to government politicians in exchange for subsidies farmers are able to tilt the terms of the bargaining game with policy makers in their favor by pre committing to an inefficient choice of semi fixed inputs government proneness to accept political contributions or bribes and its willingness to provide subsidies cause farmers to adopt inefficient modes of production as a mechanism to capture such subsidies our predictions are consistent with stylized facts on land use in latin america and suggest that subsidy schemes have been counterproductive distorting and constraining development and triggering excessive depletion of natural resources we validate some of the predictions of the model through econometric analyses using a new data set for nine countries in latin america

why stakeholder and stockholder theories are not necessarily contradictory a knightian insight the normative foundations of the investor centered model of corporate governance represented in mainstream economics by the nexus of contracts view of the firm have come under attack mainly by proponents of normative stakeholder theory we argue that the nexusof contracts view is static and limited due to its assumption of price output certainty we attempt a synthesis of the nexus of contracts and the knightian views which provides novel insights into the normative adequacy of the investor centered firm implications for scholarship and management practice follow from our discussion

species preservation versus development an experimental investigation under uncertainty the safe minimum standard sms is a decision rule to preserve renewable resources unless the social costs of doing so are intolerable while unpersuasive to many support for the sms has been advocated by some economists for settings involving irreversibility and a high degree of uncertainty the objective of this paper is to explore decision making involving species preservation versus development within an experimental laboratory setting and involving uncertainty the experimental design implements a number of prior game theoretic investigations of the sms bishop 1978 ready and bishop 1991 palmini 1999 involving insurance and lottery or combined games against nature the choices are between species preservation which possibly provides a cure for a disease or developing habitat leading to irreversible depletion econometric results from a random parameters logit model using responses from 117 participants across both u s and mexican university student samples and 9 treatment choices indicate that support for the sms varies across the type of game the imposed maximum regret condition concerning the relative magnitude of the costs of disease and net benefits of development a constructed measure of respondents risk aversion and other factors there is also strong evidence of unobservable heterogeneous preferences for preservation within our sample

frank knight on risk uncertainty and the firm a new interpretation we attempt to interpret frank knight by taking him on his own terms among our conclusions are the following 1 knight s distinction between risk and uncertainty is not solely a distinction between insurable and uninsurable risk 2 knight s explanation for the existence of firms does not reduce to a moral hazard theory except perhaps in the broadest and least interesting sense and 3 knight s treatment of the problem of the separation of ownership from control is not as obviously wrong as commentators have made it out to be

knight s moral hazard theory of organization in this paper i suggest that besides knight s well recognized uncertainty explanation of the firm he had another one moral hazard is the central feature in the second largely overlooked theory i argue and attempt to document that this theory is not a chance excursion but is rather quite well developed by knight

the economics of tropical deforestation this paper provides a survey of first wave economic studies of tropical deforestation and land use these studies of tropical forest land conversion are generally at the cross country level we also conduct a synthesis cross country analysis of tropical agricultural land expansion the results show that agricultural development is the main factor determining land expansion but institutional factors have an important influence income effects tend to vary from region to region and do not always display an environmental kuznets curve relationship copyright 2001 by blackwell publishers ltd