market power in emission permit markets theory and evidence from the eu ets a well known result about market power in emission permit markets is that efficiency can be achieved by full free allocation to the dominant firm i show that this result breaks down when taking the interaction between input and output markets into account even if the dominant firm perceives market power in the permit market alone i then examine the empirical evidence for price manipulation by the ten largest electricity firms during phase i of the eu ets i find that some firms excess allowance holdings are consistent with strategic price manipulation and that they cannot be explained by price speculation or by precautionary purchases to insure against uncertain future emissions my results suggest that market power is likely to be an empirically relevant concern during the early years of emission permit markets

drivers and triggers of international food price spikes and volatility the objective of this study is to explore empirical evidence about the quantitative importance of supply demand and market shocks for price changes in international food commodity markets to this end it distinguishes between root conditional and internal drivers of price changes using three empirical models 1 a price spike model in which monthly food price returns spikes are estimated against oil prices supply and demand shocks and excessive speculative activity 2 a volatility model in which annualized monthly variability of food prices is estimated against the same set of variables plus a financial crisis index and 3 a trigger model that estimates extreme values of price spikes and volatility using quantile regressions the results point to increasing linkages between food energy and financial markets this explains much of the observed food price spikes and volatility while financial speculation amplifies short term price spikes oil price volatility intensifies medium term price volatility

income inequality size of government and tax progressivity a positive theory abstract i investigate the relationship between income inequality and the composition of public spending in redistributive policies i extend the meltzer richard model of voting over redistribution allowing voters to choose not only the amount of a uniform lump sum transfer but also the level of provision of a public good the governmental budget is balanced thus these two choices determine the tax rate on labor income the multidimensionality of the policy space implies that there is no condorcet winner i adopt a citizen candidate model of electoral competition to tackle this problem i show that the progressivity of the tax system is increasing in the mean to median income ratio while the size of the government need not be this means that higher income inequality implies a more progressive tax system but in contrast with the traditional analysis it may also result in a smaller size of government such results are consistent with the most recent findings in the empirical literature

inequality redistribution and growth a challenge to the conventional political economy approach abstract this paper reconsiders the conventional political economy view that 1 1 more unequal societies tend to make more redistribution and 2 2 more redistribution is harmful to growth we present a number of theoretical arguments suggesting that the two previous implications are not necessarily true and that the empirically observed negative correlation between inequality and growth might just come from the fact that more unequal societies tend to redistribute less which in turn is actually detrimental to growth

explosive oil prices spectacular oil price increases occur on a regular basis the most recent one is dated july 2008 this paper puts forward the notion that extreme oil price movements of this type can be described as temporary explosive the paper applies a forward recursive unit root tests and finds evidence of explosive behavior in the following periods 1990 1991 2005 2006 and 2007 2008 currently existing oil price models are not capable of appropriately describing this type of behavior a thorough discussion of the underlying reasons of these price hikes indicates these oil price episodes even though extreme are mainly fundamentally explained this finding is insufficiently acknowledged in the literature on speculative oil price bubbles thus policy interventions as response to extreme movements of this kind need to be very carefully thought through

redistribution effects of energy and climate policy the electricity market abstract energy and climate policies are usually seen as measures to internalize externalities however as a side effect the introduction of these policies redistributes wealth between consumers and producers and within these groups while redistribution is seldom the focus of the academic literature in energy economics it plays a central role in public debates and policy decisions this paper compares the distributional effects of two major electricity policies support schemes for renewable energy sources and co2 pricing we find that the redistribution effects of both policies are large and they work in opposed directions while renewables support transfers wealth from producers to consumers carbon pricing does the opposite more specifically we show that moderate amounts of wind subsidies can increase consumer surplus even if consumers bear the subsidy costs co2 pricing in contrast increases aggregated producer surplus even without free allocation of emission allowances however not all types of producers benefit these findings are derived from an analytical model of electricity markets and a calibrated numerical model of northwestern europe our findings imply that if policy makers want to avoid large redistribution they might prefer a mix of policies even if co2 pricing alone is the first best climate policy in terms of allocative efficiency

windfall profits in the power sector during phase iii of the eu ets interplay and effects of renewables and carbon prices abstract since power utilities were originally grandfathered into the eu ets by way of a free allocation of carbon emission allowances eua the issue of windfall profits accruing to producers with carbon intensive generation portfolios has been the subject of critical analysis one of the chief aims of the switch to a predominantly auction based allocation system at the onset of phase iii of the eu ets was to negate the incidence of windfall profits the following analysis examines the merits of this policy aim drawing on economic theory of power markets a linear optimisation model covering the electricity market of the eu member states is deployed to investigate this question scenarios reflecting developments over a medium term horizon 10 years are developed with which carbon prices are endogenously determined their effects on the contribution margins of producers in the member states are subsequently evaluated the overall findings indicate that the incidence of windfall profits in the power sector remains prevalent in the overwhelming majority of eu countries the analysis suggests that the carbon intensiveness of the respective generation fleet is not the deciding factor as to whether producers earn windfall profits but rather the fundamental generation structure of the power plant fleet the results raise questions about the capacity of the current eu ets regime to provide the desired decarbonising effect on power producers generation portfolios in european power markets

windfall profits under pollution permits and output based allocation this paper analyzes the implementation of pollution permits it focuses on the distributional impacts linked with the stringency of output based allocation when two sectors are covered by the market for permits and the total cap is held constant a new type of profit increase in sectors that are not exposed to international competition when energy intensive trade exposed eite sectors are granted output based allocations is demonstrated theoretically the paper also illustrates a profit increase in the electricity sector in a possible fourth phase of the european union emission trading scheme in which output based allocation will be granted to eite sectors compared with the case in which all permits are auctioned

a biological theory of social discounting we consider a growth model in which intergenerational transfers are made via stocks of private and public capital private capital is the outcome of individuals private savings while decisions regarding public capital are made collectively we hypothesize that private saving choices evolve through individual selection while public saving decisions are the result of group selection the main result of the paper is that the equilibrium rate of return to private capital is at least 2 3 percent more than the rate of return to public capital in other words social choices involving intertemporal trade offs exhibit much more patience than individual choices do jel d11 d71 d91 h43 policy issues often involve intergenerational trade offs one highly publicized and polarizing example concerns the appropriate response to global warming while nordhaus 1994 concluded that there was no need to enact draconian policies to reduce co 2 emissions immediately stern 2006 insisted that the situation was in fact dire the difference in position can be attributed almost exclusively to the rates of time preference assumed by these two authors nordhaus used a few percent based on estimates deriving from private economic behavior while stern essentially set it equal to zero on the basis of a philosophical stance it then becomes clear that co 2 emissions should be taken seriously if for some reason private rates of time preference are too high when applied to public decisions since such decisions should then be made on the basis of a lower rate 1

economic growth with intergenerational altruism in this paper we study the properties of equilibria in an aggregative growth model with intergenerational altruism in this model each generation is active for a single period at the beginning of this period it receives an endowment of a single homogeneous good which is the output from a bequest investment made by the previous generation it divides the endowment between consumption and investment the return from this investment constitutes the endowment of the next generation each generation derives utility from its own consumption and that of its immediate successor however since altruism is limited in the sense that no generation cares about later successors the interests of distinct agents come into conflict models of this type have been used to analyze a number of issues concerning intergenerational altruism one line of research pursued by arrow 1973 and dasgupta 1974a elucidates the implications of rawls principle of just savings others beginning with phelps and pollak 1968 have addressed the question of how an altruistic growth economy might actually evolve over time topics of subsequent investigation have included the efficiency and optimality of equilibrium programs and the implications of intergenerational altruism for the distribution of wealth unfortunately the positive features of equilibrium programs have received little attention from previous authors aside from a few comments by kohlberg 1976 virtually nothing is known about the asymptotic behaviour of capital stocks in these models in particular will the long run capital stock which arises from intergenerational conflict be higher or lower than the turnpike associated with the solution to the optimal planning problem on a priori grounds the answer is not clear agents who take only a limited interest in the future will tend to bequeath less than those who are far sighted however since each generation views its children s bequest as pure waste it must bequeath a larger sum to obtain the same consumption value in this paper we obtain steady state results for equilibrium capital stocks completely analogous to the well known optimal planning results by comparing steady states we

time varying persistence in real oil prices and its determinant abstract we provide empirical evidence for pronounced time variation in the persistence of real oil prices in particular we find episodes of mild explosiveness next to periods with random walk and also mean reverting behavior we address the question whether dynamic persistence can be directly related to macro financial variables spot futures spreads spill over effects from commodities and global real economic activity alongside these variables we use a large data set of more than one hundred fifty potential determinants featuring for example further oil related variables production and inventories and key macroeconomic series for the g7 countries by using model averaging techniques we robustly account for the inherent model uncertainty when dealing with such many potential explanatory variables as it turns out the one and only significant measure to explain time varying oil price persistence is the index of global real economic activity by kilian 2009 other variables related to e g supply shocks or speculation are however insignificant in line with recent findings we argue that fundamentals rather than speculation were the drivers of the explosive oil price in the 2000s

the oil price crash in 2014 15 was there a negative financial bubble abstract this paper suggests that there was a negative bubble in oil prices in 2014 15 which decreased them beyond the level justified by economic fundamentals this proposition is corroborated by two sets of bubble detection strategies the first set consists of tests for financial bubbles while the second set consists of the log periodic power law lppl model for negative financial bubbles despite the methodological differences between these detection methods they provided the same outcome the oil price experienced a statistically significant negative financial bubble in the last months of 2014 and at the beginning of 2015 these results also hold after several robustness checks which consider the effect of conditional heteroskedasticity model set ups with additional restrictions longer data samples tests with lower frequency data and with an alternative proxy variable to measure the fundamental value of oil

date stamping historical periods of oil price explosivity 1876 2014 article i nfo this paper sets out to date stamp periods of historic oil price explosivity using the generalized sup adf gsadf test procedure developed by phillips shi and yu 2013 the date stamping procedure used in this paper is ef fective at identifying periodically collapsing bubbles a feature found lacking with previous bubble detection methods weset out to identify periods of oilpriceexplosivity relative to the general price leveland oilinventory supplies in the us since 1876 and 1920 respectively the recursive identification algorithms used in this study identify multiple periods of price explosivity and as such provides future researchers with a reference for study ing the macroeconomic impact of historical periods of significant oil price build ups

models of political economy of growth a short survey abstract this paper surveys recent work on the political economy of growth after presenting the general structure of a model of politics and growth with heterogenous agents we discuss the role of dynamic strategic political behavior the existence of multiple equilibria and how endogenous political participation interacts with the dynamics of wealth distribution and economic development

windfalls and other profits abstract windfall profits again is a popular term but mostly the term is used inappropriately this short article discusses why and proposes a more complete taxonomy of profits there exists little ground and need for policy to act against genuine windfalls while the contrary holds for other excessive earnings very few windfalls freely fallen down from winds in the sky occur after observed excessive profits are stripped from deliberate man made interventions that is why clear identification and correct language are needed

an application of models of speculative behaviour to oil prices abstract we estimate three different models of speculative behaviour using oil price data our findings provide support for the claim by phillips and yu 2011 and gilbert 2010 that a bubble in oil prices existed for a short period in 2008

through time changes in family income inequality the effect of non synchronous regional growth factors affecting the dynamics of income inequality in the us during the 1948 92 period are examined specifically it extends the work of maxwell who found that through time changes in family income inequality are related to demographic and industry factors and draws upon the insights of other researchers who have recognized that the us national economy is actually a composite of semi autonomous regional economies the results provide strong evidence that family income inequality is related to the pattern of regional economic growth and the relative proportion of unmarried families

the distribution of wealth and welfare in the presence of incomplete annuity markets this paper examines the implications of the absence of complete annuity markets on the distribution of wealth and welfare of agents whose saving decisions are obtained under uncertainty regarding the length of their life the absence of annuities is shown to yield a unique nondegenerate intragenerational distribution of wealth which is fully characterized this characterization is then used to evaluate the pareto desirability of an annuity system alternative welfare criteria that can be used when the proposed change has differential impacts on the initial state of subsequent generations are considered

fuel switching and climate and energy policies in the european power generation sector a generalized leontief model abstract the purpose of this paper is to analyze a the role and the nature of price induced switching behavior between fossil fuels i e coal oil and natural gas in the western european power sector as well as b the fuel choice impacts of a number of public policies implemented in this sector during the last 20 years the analysis is conducted within a generalized leontief cost function framework and employs pooled data across eight countries over the time period 1978 2004 we present short run own and cross price elasticities of fossil fuel demand and assess the impacts of a set of government policies implemented over this time period the empirical results show evidence of notable short run interfuel substitution between oil and gas and particularly in countries where fossil fuels are used extensively for both base and peak load purposes these findings support the notion that ex post fossil fuel substitution takes place in dual and multi fired plants by switching load between different single fuel fired plants as well as through the conversion of power plants to be able to burn alternate fuels the results also illustrate that different public policies i e removal of coal subsidies electricity market liberalization etc have had profound impacts on fossil fuel choices and have in particular favored power generation gas use at the expense of coal finally the paper makes use of the empirical results to simulate the fuel switching impacts of different carbon prices within the european emissions trading scheme eu ets

do oil prices respond to real interest rates abstract we show that the robustness of an inverse relationship between the real interest rate and real oil price depends crucially on how the real interest rate is calculated and the time frame of the sample consistent with earlier studies we find that the oil price falls with an unexpected rise in either u s or international ex ante real interest rates when the ex post real interest rate is used the oil price only falls with rises to short term rates 3 months or less additionally the response of the oil price to long term ex ante real interest rates must include the period through the mid 2000s for the inverse relationship to appear in contrast the oil price consistently falls with unexpected rises in short term real interest rates throughout the entire sample we draw two conclusions from the results the first is that the oil price is consistently responsive to short term u s and international real interest rates underlying the importance of storage second oil prices have become more responsive to long term real interest rates over time

the merit order effect a detailed analysis of the price effect of renewable electricity generation on spot market prices in germany the german feed in support of electricity generation from renewable energy sources has led to high growth rates of the supported technologies critics state that the costs for consumers are too high an important aspect to be considered in the discussion is the price effect created by renewable electricity generation this paper seeks to analyse the impact of privileged renewable electricity generation on the electricity market in germany the central aspect to be analysed is the impact of renewable electricity generation on spot market prices the results generated by an agent based simulation platform indicate that the financial volume of the price reduction is considerable in the short run this gives rise to a distributional effect which creates savings for the demand side by reducing generator profits in the case of the year 2006 the volume of the merit order effect exceeds the volume of the net support payments for renewable electricity generation which have to be paid by consumers

is democracy more expropriative than dictatorship tocquevillian wisdom revisited abstract we reexamine the incentive effect of political democracy on the tax rate by defining a political regime over two dimensions the extent of the franchise and the extent that the redistribution of tax revenues is biased towards the rich standard tocquevillian models assume that even if there is limited franchise there is no redistribution bias from this it follows that democracy is more expropriative than oligarchy because a poorer median voter opts for higher taxes introducing the realistic assumption of a redistribution bias we find a countervailing effect democratization decreases exploitation by the rich on the disenfranchised poor since tax revenues are redistributed over a larger base the median voter may gain less from redistributive taxation we call this the olson effect

integration of price depending demand reactions in an optimising energy emission model for the development of co2 mitigation strategies abstract optimising techno economic energy emission models are applied to develop and analyse cost effective co2 mitigation strategies on national and international levels one shortcoming of existing models is the missing integration of behavioural changes due to an increase in energy prices caused by the structural changes in the energy sector in order to reach the political targets for a co2 emission reduction therefore a partial equilibrium approach based on an iterative algorithm is created and applied in a co2 study for the federal republic of germany frg the results show that cost effective energy strategies avoiding co2 emissions have to consider the consumer price reactions

capital market response to emission rights returns evidence from the european power sector prior studies on the distributional effects of the european union s emission trading scheme eu ets have so far only relied on supply and demand data empirical evidence from capital markets has been missing we address this gap and measure the ets s economic consequences using the expectations of investors towards the regulatory impact on firm value employing a multifactor model we show that returns on common stock of the largest affected industry power generation are positively correlated with rising prices for emission rights this implies that the market predicts that firms are not only able to pass on their share of the regulatory burden to customers but even achieve windfall profits by overcompensating for the costs

the political economy of growth a critical survey of the recent literature this article reviews the recent literature on the political economy of growth focusing on the research that has developed at the intersection of the endogenous growth literature and the new political economy it explores the relationship among four key variables economic growth and capital accumulation political instability political freedom and democratic institutions and income inequality

on the determination of the us aggregate health care expenditure per capita real health care expenditure is examined against three major groups of explanatory variables economic demographic and health stock and it is found that the three groups of variables have an impact on real health care spending other subcategories such as real private and government health care pharmaceutical dental home nursing ambulatory personal medical consumption and in patient expenditures have also been examined and have been found to be affected by the explanatory variables for several subcomponents there is evidence of supplier inducement of the demographic group of variables the ageing population had an impact only on the per capita real overall and private health care outlay and pharmaceutical spending also cointegrating relationships were found and consistent estimators of the elasticities found

rents in the european power sector due to carbon trading abstract the european union emissions trading scheme eu ets has imposed a price on the allowances for co2 emissions of electricity companies integrating this allowance price into the price of electricity earns a rent for companies who have received these allowances for free during phase i 2005 2007 rents corresponding to the aggregate value of allocated allowances amounted to roughly 13 billion per year however due to the specific price setting mechanism in electricity markets true rents were considerably higher this is due to the fact that companies also that have not received any allowances gain additional infra marginal rents to the extent that their variable costs are below the new market price after inclusion of the allowance price producers with low carbon emissions and low marginal costs thus also benefit substantially from carbon pricing this paper develops a methodology to determine the specific interaction of the imposition of such a co2 constraint and the price setting mechanism in the electricity sector under the assumption of marginal cost pricing in a liberalized european electricity market the article thus provides an empirical estimate of the true total rents of power producers during phase i of the eu ets 2005 2007 the eu ets generated in phase i additional rents in excess of 19 billion per year for electricity producers these transfers are distributed very unevenly between different electricity producers in a second step the paper assesses the impact of switching from free allocation to an auctioning of allowances in 2013 we show that such a switch to auctioning will continue to create additional infra marginal rents for certain producers and will leave the electricity sector as a whole better off than before the introduction of the eu ets

first evidence of asymmetric cost pass through of eu emissions allowances examining wholesale electricity prices in germany abstract we test the hypothesis that rising prices of emission allowances have a stronger impact on wholesale electricity prices than falling prices asymmetric cost pass through using an autoregressive distributed lag model we confirm this hypothesis for the german market

one kind of freedom poverty dynamics in post apartheid south africa abstract a 1993 south african living standards survey documented the legacy of apartheid in the form high levels of inequality and human insecurity drawing on a 1998 re survey of households in the 1993 study this paper explores whether this legacy has been superseded or whether apartheid s end has been only one kind of freedom that has left households in a poverty trap from which they cannot escape after proposing a theoretically grounded dynamic poverty typology that distinguishes stochastic from structural poverty transitions the paper goes on to estimate that significant numbers of the south african poor are potentially trapped in a structural poverty trap and lack the means to escape poverty over time

the global food crisis disaster opportunity or non event household level evidence from cote d ivoire summary using 2008 lsms data for cote d ivoire we study the welfare implications of the price increase of key imported staple food rice and consider the consumption smoothing effect of locally produced food and cash crop varieties while middle income urban households are adversely affected by rising rice prices relatively poor rural households benefit availability of local staple alternatives leads to further income redistribution from net consumers toward net producers of staples by contrast the ability to generate income from tropical cash crops not only improves the welfare of rural households but helps smooth the consumption of urban households

factor shares and savings in endogenous growth in models of steady investment driven growth an individual s propensity to save depends on how much of his income is drawn from accumulated factors of production capital rather than from nonaccumulated factors when agents are heterogeneous in this respect growth oriented policies have distributional consequences and in the absence of lump sum redistribution their implementation faces political constraints if the median voter is capital poor relative to the economy s representative agent political interactions tend to slow down growth when policy acts on capital s income share and tend to accelerate it when investment subsidies are the policy instrument of choice copyright 1993 by american economic association

distributive politics and economic growth a crude distinction between economics and politics would be that economics is concerned with expanding the pie while politics is about distributing it in this paper we analyze the relationship between the two we focus on how an economy s initial configuration of resources shapes the political struggle for income and wealth distribution and how that in turn affects long run growth our main conclusion is that inequality is conducive to the adoption of growth retarding policies we derive this result from a simple political economy model of growth and present cross country evidence consistent with it the key feature of our model is that individuals differ in their relative factor endowments we distinguish between two types of factors an accumulated factor called capital and a nonaccumulated factor called labor growth is driven by the expansion of the capital stock which is in turn determined by individual saving decisions long run growth is endogenous as the aggregate production function is taken to be linearly homogeneous in capital and productive government services taken together the provision of government services is financed by a tax on capital because government services are productive a small tax on

on endogenizing long run growth this assessment of recent theoretical work on endogenous growth identifies three different engines of long run growth i the asymptotic average product of capital is positive ii labor productivity increases as an external effect of capital accumulation iii there are feedback effects on the cost of accumulating knowledge or innovating a general model encompassing all three is considered and then used to review different proposed determinants of long run growth rates the contribution of endogenous growth theory has been to create a framework in which to explain why economic institutions and policies can have long run effects on growth rates

an overview of co2 cost pass through to electricity prices in europe this paper investigates the link between wholesale electricity prices in europe and the co2 cost i e the price of european union allowances euas over the two first phases of the european union emissions trading scheme eu ets we set up a theoretical framework and an empirical model to estimate to what extent daily fluctuations of co2 costs may have impacted electricity prices regarding estimation results for the first phase of the eu ets about 42 of estimated pass through rates appear to be statistically significant while only one third of them are statistically different from zero in the second phase we try to improve those results by proposing alternative estimates based on the eu ets compliance periods

distribution and growth cross country evidence an endogenous growth model is presented to examine the determinants of economic growth and income distribution and their relationship three major findings from a cross country analysis of 45 countries are 1 a higher level of educational attainment of the labour force has an equalizing effect on income distribution while the larger the dispersion of schooling among the labour force the greater the income inequality 2 human capital investment as well as physical capital investment are significant factors contributing to economic growth and 3 income inequality has a negative effect on economic growth supporting the existence of a complementary relationship between equity and growth

how emission certificate allocations distort fossil investments the german example despite political activities to foster a low carbon energy transition germany currently sees a considerable number of new coal power plants being added to its power mix there are several possible drivers for this dash for coal but it is widely accepted that windfall profits gained through free allocation of ets certificates play an important role yet the quantification of allocation related investment distortions has been limited to back of the envelope calculations and stylized models so far we close this gap with a numerical model integrating both germany s particular allocation rules and its specific power generation structure we find that technology specific new entrant provisions have substantially increased incentives to invest in hard coal plants red to natural gas at the time of the ets onset more precisely disproportionate windfall profits compared more than half the total capital costs of a hard coal plant moreover shorter periods of free allocations would not have turned investors favours towards the cleaner natural gas technology because of pre existing economic advantages for coal in contrast full auctioning of permits or a single best available technology benchmark would have made natural gas the predominant technology of choice

distributional effects of growth and public expenditures in africa estimates for tanzania and rwanda summary in this paper we explore the effects of fiscal policies and growth on measures of household welfare across the distribution of expenditures for two african countries rwanda and tanzania we explore the effect of government expenditures on expenditure growth in each quintile of the expenditure distribution and the effect of growth for each group we find that the benefits of growth are concentrated among the better off sectors of the population in these two countries perhaps to the detriment of the poorer sectors by looking at the effects within a country and across different groups of households and administrative entities we exploit variation in expenditures and growth across and within regions of each country to estimate the elasticities of expenditure with respect to fiscal expenditure and mean expenditure growth at different points of the expenditure distribution using household survey data and government expenditure data at the district level we find that overall mean expenditure growth benefits the top expenditure groups the welfare spillovers are mostly present for top 20 of the expenditure distribution with the middle of the distribution in tanzania responding slightly to these spillovers public social expenditures do not appear to affect inequality considerably but do tend to work toward decreasing inequality however mean expenditure growth is related to increases in inequality in the sense that the richest sectors of the population benefit the most from growth we find that the growth elasticity of expenditure is only above one for the top quintile in both countries in tanzania a 1 increase in average household expenditure is related to a 1 96 expenditure growth in the top quintile and 0 43 in the third quintile in rwanda a 1 increase in average household expenditure is related to a 1 93 increase in household expenditure in the top 20 of the distribution

risk bearing and the theory of income distribution this paper develops the stochastic theory of distribution with a dynamic model which focuses on the role of incomplete insurance in generating inequality unlike previous work our approach takes explicit account of the reason for market incompleteness in modeling agents behaviour in particular the amount of risk borne is endogenous using a model of growth with altruism in which agents are risk averse and there is moral hazard we show that lineage wealth follows a markov process which converges globally to an ergodic distribution this also represents the long run population distribution of wealth we discuss the role of particular assumptions such as availability of production loans and unboundedness of utility in yielding the qualitative properties of the distribution of wealth the choice of occupation and the prevention of poverty traps