index insurance quality and basis risk evidence from northern kenya the number of index insurance pilots in developing countries has grown tremendously in recent years but there has been little progress in our understanding of the quality of those products basis risk or remaining uninsured risk is a widely recognized but rarely measured feature of index insurance product quality this article uses eight semi annual seasons of longitudinal household data to examine the distribution of basis risk associated with an index based livestock insurance ibli product in northern kenya we find that ibli coverage reduces exposure to covariate risk due to large shocks and mitigates downside risk substantially for many households even at commercial premium rates but index insurance is no magic bullet insured households continue to face considerable basis risk examining the components of basis risk we find that ibli reduces exposure to covariate risk due to high loss events by an average of 63 the benefits of reduced covariate risk exposure are relatively small however due to high exposure to seemingly mostly random idiosyncratic risk even in this population often thought to suffer largely from covariate shocks the result is that ibli policyholders are left with an average of 69 of their original risk due to high loss events this research underscores the need for caution when promoting index insurance as a risk mitigation tool as well as the importance of product quality evaluation

bulls bears and market sheep abstract a deterministic excess demand model of stock market behavior is presented that generates stochastically fluctuating prices and randomly switching bear and bull markets

you can t save alone commitment in rotating savings and credit associations in kenya abstract this article examines one reason why individuals develop and maintain local level financial savings organizations known as rotating savings and credit organizations or roscas economic theories suggest that individuals form roscas to finance the purchase of a lumpy durable good in response to intrahousehold conflict over savings or to provide themselves with insurance the article proposes an additional hypothesis for rosca participation saving requires discipline and some roscas may be formed to provide a collective mechanism for commitment in the presence of time inconsistent preferences data from 70 roscas located in western kenya indicate that the commitment hypothesis is plausible and broadly consistent with the design and patterns of participation in these roscas as many rosca participants put it you can t save alone

the economic impact of social ties evidence from german reunification we use the fall of the berlin wall in 1989 to show that personal relationships which individuals maintain for noneconomic reasons can be an important determinant of regional economic growth we show that west german households who had social ties to east germany in 1989 experienced a persistent rise in their personal incomes after the fall of the berlin wall moreover the presence of these households significantly affects economic performance at the regional level it increases the returns to entrepreneurial activity the share of households who become entrepreneurs and the likelihood that firms based within a given west german region invest in east germany as a result west german regions that for idiosyncratic reasons have a high concentration of households with social ties to the east exhibit substantially higher growth in income per capita in the early 1990s a one standard deviation rise in the share of households with social ties to east germany in 1989 is associated with a 4 7 percentage point rise in income per capita over six years we interpret our findings as evidence of a causal link between social ties and regional economic

crude oil trade and current account deficits abstract this paper provides an empirical exploration into the relationship between crude oil trade and a nation s current account for 91 countries over the 1984 2009 period reduced oil import dependence may initially reduce a country s general trade deficit under certain conditions the analysis probes the nature of this relationship and whether it holds equally to oil importing and oil exporting countries after controlling for other exogenous drivers we find that net oil exports are a significant factor in explaining current account surpluses but that net oil imports often do not influence current account deficits among all oil importers the one exception applies to relatively rich countries where higher oil imports appear to contribute to greater current account deficits one explanation for these trends is that oil exporters and wealthier oil importers may view oil income gains and losses as temporary income sources that influence their savings patterns

a characterization of erratic dynamics in the overlapping generations model abstract in this paper we characterize and give examples o wide classes of utility functions which generate erratic dynamics in the standard deterministic overlapping generations model erratic dynamics refers to feasible trajectories which are bounded but which do not converge to stationary points or periodic orbits we show that such trajectories are pareto efficient we introduce credit into the model and show how a constant credit expansion rate can result in erratic trajectories in prices and the real value of credit finally we briefly discuss certain technical aspects of the mathematics used and the statistical nature of the dynamics that can arise from deterministic dynamical systems

weaving straw into gold managing organizational tensions between standardization and flexibility in microfinance this article explores how organizations balance the pressures to pursue efficiency through standardization with the need to remain responsive to local needs the study combines rich ethnography with detailed loan data to show that both standardization and flexibility through relational ties provide substantial organizational benefits but also carry significant costs thus no strategy is inherently superior and their coexistence generates the best results such coexistence however creates contradictions that must be managed here i use microfinance as a strategic setting and gain analytic leverage from the random assignment across branches of loan officers who exhibit significant heterogeneity in rule enforcement styles some enforce rules strictly whereas others frequently bend them to respond to client needs i find that loan officers with relational styles exercise discretion productively to enhance organizational performance yet their effectiveness is contingent on the presence of rule enforcing peers as evidenced by the significant underperformance of branches with a high concentration of officers of either type in contrast branches that contain discretionary diversity or a balance between enforcement styles perform best this is not due to diversity per se but because loan officers process decisions in local credit committees committees that contain discretionary diversity generate a productive tension that induces participants to justify decisions along broader organizational goals thus maintaining a productive balance between standardization and flexibility implications for organizational theory and practice are discussed

tunisia s lending program to smes anatomy of an institutional failure this paper studies a case of what in many respects is an institutional failure it is the popular lending program in tunisia known as foprodi created in 1974 for the promotion of small and medium manufacturing enterprises smes and for the decentralization of industry foprodi s announced aim was to help new entrepreneurs with insufficient capital to start their businesses and thereby to create new jobs because of an extremely low repayment rate the program has failed in the sense that it became unsustainable and indeed finally collapsed in 1997 while there are some bases for believing that foprodi may have been more successful than it might seem in social terms at this point it seems to have been a failure the sources of its institutional failure are traced to inappropriate incentives attributable both to the institutional structure surrounding foprodi and its own rules the findings are then used to generate policy recommendations on ways in which similar programs could be better designed transaction costs reduced and the outcomes obtained more satisfactory

the microfinance promise in the past decade microfinance programs have demonstrated that it is possible to lend to low income households while maintaining high repayment rates even without requiring collateral the programs promise a revolution in approaches to alleviating poverty and spreading financial services and millions of poor households are served globally a growing body of economic theory demonstrates how new contractual forms offer a key to microfinance success particularly the use of group lending contracts with joint liability for the most part however high repayment rates have not translated into profits and studies of impacts on poverty yield a mixed picture in describing emerging tensions the paper highlights the diversity of innovative mechanisms beyond group lending contracts the measurement of financial sustainability the estimation of economic and social impacts the costs and benefits of subsidization and the potential to reduce poverty through savings programs rather than just credit the promise of microfinance has pushed far ahead of the evidence and an agenda is put forward for addressing critical empirical gaps and sharpening the terms of policy discussion

compound risk aversion ambiguity and the willingness to pay for microinsurance abstract index insurance in which payments are based on an index correlated with but not identical to individual losses has been faced with an unexpectedly low uptake despite its promise as a tool for poverty alleviation this paper offers new insights into the behavioral impediments to the uptake of index insurance we start from the observation that an index insurance contract appears to the farmer as a compound lottery with uncertainty about individual production outcomes as well as about the validity of the index as a reflection of individual losses adopting the smooth model of ambiguity aversion to this insurance problem we show that in theory this compound lottery structure per se will dampen the demand for index insurance using framed field experiments with cotton farmers in southern mali we elicited the coefficients of risk aversion and compound risk aversion the experimental results find that almost 60 of farmers are compound risk averse and that the distribution of compound risk aversion is such that it would nearly cut in half the potential demand for the standard index insurance contracts our results highlight the importance of designing contracts with minimal basis risk under compound risk aversion such a reduction in basis risk would not only enhance the value and productivity impacts of index insurance but would also assure that the contracts are purchased and have their anticipated impacts

managing basis risk with multiscale index insurance agricultural index insurance indemnifies a farmer against losses based on an index that is correlated with but not identical to her or his individual outcomes in practice the level of correlation may be modest exposing insured farmers to residual basis risk in this article we study the impact of basis risk on the demand for index insurance under risk and compound risk aversion we simulate the impact of basis risk on the demand for index insurance by malian cotton farmers using data from field experiments that reveal the distributions of risk and compound risk aversion the analysis shows that compound risk aversion depresses demand for a conventional index insurance contract some 13 percentage points below what would be predicted based on risk aversion alone we then analyze an innovative multiscale index insurance contract that reduces basis risk relative to conventional single scale index insurance contract simulations indicate that demand for this multiscale contract would be some 40 higher than the demand for an equivalently priced conventional contract in the population of malian cotton farmers finally we report and discuss the actual uptake of a multiscale contract introduced in mali

the basic analytics of moral hazard the basic analytics of moral hazard are developed using the simplest possible model of the insurance market even when the underlying expected utility function and the function relating the accident probability to accident prevention effort are extremely well behaved the indifference curves and feasibility set the set of insurance contracts which at least break even are not indifference curves need not be convex and feasibility sets never are priceand income consumption lines may be discontinuous and effort is not in general a monotonic or continuous function of the parameters of the insurance policies provided

rotating savings and credit associations the choice between random and bidding allocation of funds abstract the performance and efficiency of random and bidding rotating savings and credit associations roscas are compared within a game theoretic model information about individuals return from investing the rosca pool is assumed to be asymmetric and imperfect and rosca members are allowed to use funds raised outside the rosca to supplement the funds raised in the rosca the conclusion is that although both types of roscas can improve individual welfare the bidding rosca is preferred to the random rosca except when credit from other sources is costly and types of rosca members are not widely dispersed

is grameen lending efficient repayment incentives and insurance in village economies many believe that a key innovation by the grameen bank is to encourage borrowers to help each other in hard times to analyse this we study a mechanism design problem where borrowers share information about each other but their limited side contracting ability prevents them from writing complete insurance contracts we derive a lending mechanism which efficiently induces mutual insurance it is necessary for borrowers to submit reports about each other to achieve efficiency such cross reporting increases the bargaining power of unsuccessful borrowers and is robust to collusion against the bank copyright 2004 wiley blackwell

lessons from the kibbutz on the equality incentives trade off the first kibbutz was established southwest of the sea of galilee in 1910 but the vast majority of kibbutzim were established in the 1930s and 1940s shortly before the creation of the state of israel in 1948 founders aimed to create a new human being who cared about the group more than about himself a homo sociologicus who would challenge the selfish homo economicus this idealistic view can explain many of the key features of kibbutzim equal sharing in the distribution of income no private property a noncash economy communal dining halls where members ate their meals together high provision of local public goods for use by kibbutz members separate communal residences for children outside their parents homes which were supposed to free women from their traditional role in society and allow them to be treated equally with men collective education to instill socialist and zionist values communal production whereby kibbutz members worked inside their kibbutzim in agriculture or in one of the kibbutz plants and no use of hired labor from outside kibbutzim because hiring labor was considered exploitation under the reigning socialist ideology to an economist steeped in thinking about incentives that self interested individuals face there are three reasons why an equal sharing arrangement of this sort seems unlikely to last first high ability members have an incentive to exit equal sharing arrangements to earn a wage premium so called brain drain second low ability individuals have an incentive to enter equal sharing arrangements so that they can be subsidized by more able individuals so called adverse selection third in context of equal sharing shirking and free riding are likely to be prevalent however kibbutzim have survived successfully for the past century and currently consist of 120 000 members living in 268 kibbutzim in a number of ways the kibbutzim offer an exceptional environment to examine the potential trade off between equality and incentives

experiments in islamic microfinance abstract microfinance has been identified as an important tool in increasing the productivity of the poor and in aiding economic development however a large proportion of the poor are practicing muslims and are thus unable to take advantage of traditional microfinance contracts which involve the payment of interest this paper describes and experimentally tests islamic compliant microfinance products in the context of information asymmetry and costly state verification we find significantly higher compliance rates for the islamic compliant contracts profit sharing and joint venture than for the traditional contract interest based we believe that there is great promise for these types of loans in the microfinance context for both muslims and non muslims

incentives in principal agent relationships this article identifies some of the major issues that have been examined in the literature on incentives the article begins by discussing the frictions that lie at the heart of incentive problems next the principal s optimal response to these frictions is explored taking as given the characteristics of the agents with whom the principal interacts in a nonrepeated setting the design of individualized contracts contests and tournaments is analyzed then the principal s task of selecting the best agent is addressed and repeated agency relationships are considered

loan officers gender and microfinance repayment rates this study examines the impact of loan officer characteristics on repayment rates of microfinance borrowers in mexico applying multilevel analyses with special attention to the impact of the gender of the loan officer on default rates the results strongly suggest that loan officers play a crucial role in improving repayment rates in microfinance and that male loan officers are better able to induce borrowers to repay than female loan officers this may be because men exert authority over women and face fewer problems working late travelling through unsafe places and combining a position as counsellor with enforcing repayment

the effect of social capital on group loan repayment evidence from field experiments an important question to microfinance is the relevance of existing social capital in target communities to the performance of group lending this research presents evidence from field experiments in south africa and armenia in which subjects participate in trust and microfinance games we present evidence that personal trust between group members and social homogeneity are more important to group loan repayment than general societal trust or acquaintanceship between members we also find some evidence of reciprocity those who have been helped by other group members in the past are more likely to contribute in the future during the past decade exploring the role that social capital plays in economic behaviour has emerged as one of the most fascinating and fertile areas of economic research although precise definitions of social capital are notoriously difficult to pin down one of the early pioneers of the concept coleman 1988 defines social capital as social structure that facilitates certain actions of actors within the structure in his definition coleman specifically highlights the roles of mutual obligation expectations and trustworthiness social norms social sanctions and the transmission of information important studies in both developed and developing countries have analysed the impact of social capital in economic relationships putnam s celebrated work making democracy work civic traditions in modern italy 1993 and bowling alone america s declining social capital 1995 brought attention to the role that social capital plays in the development of the modern state udry s ground breaking 1994 work in nigeria illustrated how the social capital existing in traditional societies may allow for more efficient credit contracts than in developed economies with weaker social

signal jamming in new credit markets this paper develops a simple two period model in which a lender s credit operations in a new market end up externalizing information on borrowers repayment capabilities this information improves the competitive position of outside lenders by allowing them to enter the credit market with a more accurate description of potential clients equilibrium strategies are then identified where an inside lender chooses to offer a costly first period contract with the explicit objective of distorting the quality of the external information flow in the second period

an analysis of offer functions of banks and credit unions in guatemala economists have sought to identify institutions which might fill the gap in household access to credit arising from rationing by formal lenders credit unions have been identified as institutions which might use informational and monitoring advantages to fill that gap using information on household perceptions of their access to credit this article analyses the impact of certain credit unions on the access to credit of households in guatemala regression results indicate that credit unions serve markets unserved by formal lenders and that information on household perceptions of their access to credit is important in making inferences about lender lending activities

tailored to the extremes quantile regression for index based insurance contract design a new approach for weather index based insurance design based on quantile regression qr to condition the yield index dependency is developed and compared to standard regression technique three conceptual different risk measures i e expected utility expected shortfall and a spectral risk measure are used to evaluate the risk reducing properties of these contracts our findings show that qr is much more powerful in establishing the yield index dependency and lead for all risk measures to a higher risk reduction than the standard technique ordinary least squares ols thus qr leads to a more efficient contract design which is beneficial for both the insurer smaller remaining risk and the insured higher demand and willingness to pay our empirical application is based on a 31 years long time series of wheat yield data from northern kazakhstan

moral hazard and peer monitoring in a laboratory microfinance experiment abstract this paper reports the results from a laboratory microfinance experiment of group lending in the presence of moral hazard and costly peer monitoring we compare peer monitoring treatments in which credit is provided to members of the group to individual lending treatments with lender monitoring we find that if the cost of peer monitoring is lower than the cost of lender monitoring peer monitoring results in higher loan frequencies higher monitoring and higher repayment rates compared to lender monitoring in the absence of monitoring cost differences however lending monitoring and repayment behavior is mostly similar across group and individual lending schemes within group lending contrary to theoretical predictions simultaneous and sequential lending rules provide equivalent empirical performance

the emergence of chaos from classical economic growth this paper shows how fluctuations of an erratic and unstable nature can emerge from the classical deterministic economic growth process implications of the analysis would appear to be at least two first pronounced changes in the way an economy behaves need not cause us to reject our understanding of how it works second we need not seek in exogenous forces an explanation as to why behavioral patterns change and why it may be so difficult to anticipate future events from the profile of past experience

weather index insurance for agricultural development introduction and overview this introductory paper highlights the key attributes of weather index insurance and summarizes the major points and conclusions of the three subsequent papers included in the special issue

irregular growth cycles this paper uses the familiar neoclassical theory of capital accumulation to show how complex behavior can emerge from quite simple economic structures indeed when sufficient nonlinearities and a production lag are present the interaction alone of the propensity to save and the productivity of capital can lead to growth cycles that exhibit a wandering sawtooth pattern not unlike those observed in reality these fluctuations need not converge to a cycle of any regular periodicity so they are not quasi periodic because such chaotic trajectories are unstable errors of estimation in parameters or initial conditions however tiny will accumulate rapidly into substantial errors of forecast moreover periods of erratic cycling can be interspersed with periods of more or less stable growth evidently the future behavior of a model solution cannot be anticipated from its patterns in the past a situation that seems to mimic experience apparent structural change and unpredictability is explained in the present theory by a deterministic single equation model random shocks play no role so the reader can visualize just what it is we are are talking about a noteworthy simulation is presented in figure 1 for gnp in a growth model that is described below in section iii a period of relatively rapid growth is followed by a period of cycles then remarkably for a considerable time about twenty periods apparently steady state growth occurs wandering cycles however emerge another brief period close to the steady state appears again toward the end of the series i establish conditions of savings and productivity that lead to results of this kind this analysis makes use of the mathematical theory of chaos which in the form exploited here originated in the work of edward lorenz a formal definition of chaos and sufficient conditions for chaotic trajectories were provided in a seminal paper by t y li and james yorke a survey of these related contributions is found in yorke and evelyn yorke this theory was introduced into economics by jess benhabib and myself 1981 where we showed that sequences of rational choices can be erratic when preferences depend on experience in a certain way by michael stutzer who provides a detailed analysis of trygve haavelmo s growth model by benhabib and myself 1980 in an application of the overlapping generations model and in my forthcoming study of the classical growth model

the design of successful rural financial intermediaries evidence from indonesia abstract the success outreach and sustainability of eight rural financial intermediation systems in indonesia in profitably reaching large numbers of small individual clients is explained in terms of organizational design networks of semiautonomous units use local information and contract enforcement mechanisms to lower transaction costs reflecting basic concerns with institutional and financial viability elements of mechanism design have included compatible incentives such as performance based compensations profit sharing collection fees efficiency wages equivalent to quasi equity and system monitoring managerial discretion over transactions conducted at market terms policies to protect portfolio value and no dependency creating subsidies are important interventions have been appropriate for the problem at hand

moral hazard and optimal commodity taxation abstract this paper demonstrates that in an economy with moral hazard and more than one commodity competitive equilibrium is not constrained efficient to correct the market failure differential commodity taxation is necessary a general optimal tax formula is derived and special cases of is discussed

fractionalization entrepreneurship and the institutional environment for entrepreneurship the vast majority of the literature on ethnicity and entrepreneurship focuses on the construct of ethnic entrepreneurship however very little is known about how ethnic heterogeneity affects entrepreneurship and the institutional arrangements affecting entrepreneurship this study attempts to fill the gap and thus examines the effect of ethnic heterogeneity on various outcomes associated with entrepreneurship and the institutional environment for entrepreneurship using indices of ethnic and linguistic fractionalization we show that ethnic heterogeneity negatively influences entrepreneurship we argue that potential channels that can explain the negative effect of fractionalization on entrepreneurship include trust social network and innovation among others this study provides a new perspective on the existing debate that seeks to understand why the levels of entrepreneurial success vary across countries

socio economic studies on suicide a survey abstract in this paper we review economic theories and empirical studies on the socio economic aspects of suicide through our survey we would like to emphasize the importance of studying suicide by employing a rational approach that complements the medical perspective on suicide we first introduce major economic theories of suicide and then present a summary of a variety of empirical studies from the socio economic perspective to shed light on the mixed empirical evidence we employ a meta regression method to investigate how the existing empirical results vary we have identified a publication bias not highlighted previously in the existing literature with respect to several commonly employed socio economic factors several characteristics of existing studies have been identified as influencing the qualitative outcome we then discuss the recent developments in economic studies on suicide on the basis of the authors ongoing project on suicide in the concluding section we point out some issues for further studies

microfinance spillovers a model of competition in informal credit markets with an application to indian villages despite widespread interest in the development of microfinance spillover effects on the non using population and redistributive issues remain largely unexplored i study a competition game between microfinance institutions mfis offering joint liability loans and moneylenders offering individual loans in presence of adverse selection i show that one unintended consequence of the entry of a microfinance sector in local credit markets can be to trigger an increase in the equilibrium informal interest rate because mfis tend to attract a disproportionately safe share of the borrower pool away from incumbent moneylenders the existence of such composition externality depends crucially on the size of the microfinance sector and the risk composition of the borrower pool the model predicts a non linearly increasing relationship between informal interest rates and mfis capacity in relatively safe credit markets and no relationship in risky villages i show evidence supporting these predictions using a first hand panel database that records all credit transactions over 8 years for a sample of about 1000 households living in indian villages with extensive space and time variation in the size of their microfinance sector

ethnic diversity and poverty we examine the relationship between ethnic diversity and poverty for a cross sectional sample of developing countries we measure diversity using indices of ethnic and linguistic fractionalization and measure poverty using the multidimensional poverty index mpi multidimensional poverty headcount mph intensity of deprivation poverty gap and poverty headcount ratio we find that ethnic and linguistic fractionalization contributes to poverty levels specifically after controlling for endogeneity we find that a standard deviation increase in ethnic fractionalization is associated with a 0 32 0 44 and 0 53 standard deviation increase in the mpi mph and the intensity of deprivation respectively moreover a standard deviation increase in ethnic fractionalization is associated with between a 0 34 and 0 63 standard deviation increase in the population living below 1 90 and 3 10 the poverty gap at 1 90 and 3 10 a day and the headcount ratio at 1 90 and 3 10 a day similar results are also observed for linguistic fractionalization with standardized coefficients between 0 53 and 0 93 we find that our results are robust to alternative ways to measure poverty and ethnic diversity including ethnic polarization as well as alternative approaches to address endogeneity

social connections and group banking lending to the poor is expensive due to high screening monitoring and enforcement costs group lending advocates believe lenders overcome this by harnessing social connections using data from finca peru i exploit a quasi random group formation process to find evidence of peers successfully monitoring and enforcing joint liability loans individuals with stronger social connections to their fellow group members i e either living closer or being of a similar culture have higher repayment and higher savings furthermore i observe direct evidence that relationships deteriorate after default and that through successful monitoring individuals know who to punish and who not to punish after default

joint liability borrowing and suicide the case of japan abstract this paper develops a model for joint liability borrowings that facilitates credit market transactions ex ante but may induce the borrower s suicide ex post through the stigma associated with default a japanese suicide survey provides some supportive evidence

using repayment data to test across models of joint liability lending theories rationalising joint liability lending are rich in implications for repayment rates we exploit this fact to test four diverse models we show that the models repayment implications do not always coincide for example higher correlation of output and borrowers ability to act cooperatively can raise or lower repayment depending on the model data from thai borrowing groups suggest that repayment is affected negatively by the joint liability rate ceteris paribus and social ties and positively by the strength of local sanctions and correlated returns further the relative fit of the adverse selection versus informal sanctions models varies by region

bank branch presence and access to credit in low to moderate income neighborhoods banks specialize in lending to informationally opaque borrowers by collecting soft information about them some researchers claim that this process requires a physical presence in the market to lower information collection costs the author provides evidence in support of this argument in the mortgage market for low income borrowers mortgage originations increase and interest spreads decline when there is a bank branch located in a low to moderate income neighborhood

optimal partial group liability in microfinance lending abstract this paper develops a model of group borrowing that incorporates partial group liability where borrowers are penalized if their group members default but are not held responsible for the entirety of the failed loan the model illustrates a trade off of group liability lending while higher levels of group liability increase within group risk sharing if liability is too high borrowers strategically default the model predicts the existence of an optimal partial liability that maximizes transfers between group members while avoiding strategic default consistent with this prediction loan officers from a large microfinance institution in southern mexico who rarely allow one group member to repay while the other defaults achieve substantially lower default rates than loan officers for whom the practice is commonplace or for those for whom it has never occurred structural estimation using repayment data suggests that while a partial liability below full liability may reduce default rates the incidence of strategic default is rare

price vs weather shock hedging for cash crops ex ante evaluation for cotton producers in cameroon abstract in the sudano sahelian zone which includes northern cameroon the inter annual variability of the rainy season is high and irrigation scarce as a consequence bad rainy seasons have a detrimental impact on crop yield in this paper we assess the risk mitigation capacity of weather index based insurance for cotton farmers we compare the ability of various indices mainly based on daily rainfall to increase the expected utility of a representative risk averse farmer we first give a tractable definition of basis risk and use it to show that weather index based insurance is associated with a large basis risk whatever the index considered it has thus limited potential for income smoothing a conclusion which is robust to the utility function second in accordance with the existing agronomical literature we find that the length of the cotton growing cycle in days is the best performing index considered third we show that using observed cotton sowing dates to define the length of the growing cycle significantly decreases the basis risk compared to using simulated sowing dates finally we find that the gain of the weather index based insurance is lower than that of hedging against cotton price fluctuations provided by the national cotton company this casts doubt on the strategy of supporting weather index insurances in cash crop sectors selling at international market prices without recommending any price stabilisation scheme

group lending with sequential financing contingent renewal and social capital this paper focuses on the dynamic aspects of group lending in particular sequential financing and contingent renewal we examine the efficacy of these two schemes in harnessing social capital we find that for the appropriate parameter configurations there is homogenous group formation so that the lender can ascertain the identity of a group without lending to all its members thus screening out bad borrowers partially moreover under certain parameter configurations negative assortative matching occurs as a robust phenomenon

rational choice and erratic behaviour in this paper we show that rational choice in a stationary environment can lead to erratic behaviour when preferences depend on experience we mean by erratic behaviour choice sequences that do not converge to a long run stationary value or to any periodic pattern early investigations of the effects of experience on choice goes back to pareto see also benhabib 1979 some keynesian theories of the consumption function incorporate the effects of experience and habit formation on current levels of consumption duesenberry 1949 modigliani 1949 and brown 1952 a general model of experience dependent choice was described in day 1970 and investigated in day and kennedy 1971 while the specific issue of the existence of stable representable long run consumer demand when tastes vary endogenously has been treated by gorman 1967 pollak 1970 1976 weizsaicker 1971 mccarthy 1974 and hammond 1976 pollak gave conditions for the representability of long run choice when the equations of preference dependence are linear and utility additive hammond in a generalization of these findings provides conditions for stable representable long run choice when preferences are acyclic a condition which in essence assures convergence to a long run choice

segmentation in the informal credit markets the case of the philippines this paper explains market segmentation that occurs in the philippine informal credit markets through the matching of borrowers and lenders by their occupational specializations to internalize transaction costs and facilitate economic activity the regression results support a predictable pattern of matching farmer lenders with borrowers specialized in non farm activities and trader lenders with borrowers specialized in farming

delegated monitors large and small germany s banking system 1800 1914 banks play a greater role in the german financial system than in those of the united states or britain germany s large universal banks are admired by those who advocate bank deregulation in the united states others admire the universal banks for their supposed role in corporate governance and industrial finance many discussions distort the german banking system by overstressing one of several types of banks and ignore the competition and cooperation between the famous universal banks and other banking groups tracing the historical development of the german banking system from the early nineteenth century places the large universal banks in context

determinants of credit rationing a study of informal lenders and formal credit groups in madagascar abstract previous research on the determinants of credit rationing focused exclusively on the behavior of formal lenders who contract directly with an individual borrower based on survey data from madagascar this paper presents an analysis of credit rationing by informal lenders and by members of community based groups that allocate formal group loans among themselves the results show that group members are able to obtain and to use locally available information about the applicant s creditworthiness in much the same way as informal lenders do both types of lenders use the applicant s debt servicing obligations and income as the main criteria for credit rationing this paper therefore empirically confirms theoretical arguments that community based groups have an information advantage over distant formal bank agents

insurance contracts when individuals greatly value certainty results from a field experiment in burkina faso abstract in discussing the paradoxical violation of expected utility theory that bears his name maurice allais noted that people tend to greatly value certainty allais observation implies that people will undervalue insurance relative to the predictions of expected utility theory because as conventionally constructed insurance offers an uncertain benefit in exchange for a certain cost pursuing this logic we implemented insurance games with cotton farmers in burkina faso on average farmer willingness to pay for insurance increases significantly when a premium rebate framing is used to render both costs and benefits of insurance uncertain we show that the impact of the rebate frame on the willingness to pay for insurance is driven by those farmers who exhibit a well defined discontinuous preference for certainty a concept that we adapt from the u v model of utility and measure with a novel behavioral experiment given that the potential impacts of insurance for small scale farmers are high and yet demand for conventionally framed contracts is often low the insights from this paper suggest welfare enhancing ways of designing insurance for low income farmers

optimum pricing of mutual guarantees for credit the main finding of this paper is that under financial market impediments and asymmetric information a mutually guaranteed and correctly schemed and priced insurance credit contract should have an abnormal actuarial profit such a contract improves welfare by simultaneously eliminating underinvestment ui and overinvestment oi and by reducing the probability of the insurer s ruin this solution is relevant for mutual credit insurance agencies and international or governmental agencies interested in increasing the value creation of small and medium enterprises that suffer from limited access to equity and debt markets

the limits of equality insights from the israeli kibbutz what limits the capacity of society to redistribute what determines the structure of compensation in organizations striving for income equality this paper addresses these questions by investigating the economic and sociological forces underlying the persistence of the israeli kibbutzim communities based on the principle of income equality to do this i exploit newly assembled data on kibbutzim and a financial crisis in the late 1980s that affected them differentially the main findings are that 1 productive individuals are the most likely to exit and a kibbutz s wealth serves as a lock in device that increases the value of staying 2 higher wealth reduces exit and supports a high degree of income equality and 3 ideology facilitates income equality using a simple model i show that these findings are consistent with a view of the kibbutz as providing optimal insurance when members have the option of leaving more generally these findings contribute to an understanding of how mobility limits redistribution and to an understanding of the determinants of the sharing rule in other types of organizations such as professional partnerships cooperatives and labor managed firms

here today gone tomorrow can dynamic incentives make microfinance more flexible this paper presents a model of microfinance lending to individuals that uses dynamic incentives in the form of access to additional loans to discourage borrowers from strategic default or the unwillingness to repay a loan once a positive outcome is realized we propose an improvement on contracts currently used by microfinance institutions mfis by endogenizing the default penalty while constraining the mfi to maintain sustainable lending operations furthermore accounting for the risks that the poor face by including a negative economic shock we show that under certain circumstances the punishment for default need not be a lifetime without loans

volatility spillovers for energy prices a diagonal bekk approach abstract we examine the relationship between return and volatility as well as the covolatility spillover for energy foreign currency and stock markets using the diagonal bekk model using daily crude oil natural gas and the coal prices as proxies for energy prices the s p500 index as a proxy for the u s stock market and the eur usd exchange rate as a proxy for the exchange rate we find robust evidence for the volatility spillover effects among the three markets also in the 16 out of 20 pairwise relationships in the five markets there are significant negative covolatility spillover effects in the four pairs involving coal there are positive and significant covolatility spillover effects we conclude that the energy markets and the stock market have stronger covolatility spillovers than others

policies and impact an analysis of village level microfinance institutions this paper uses variation in policies and institutional characteristics to evaluate the impacts of village level microfinance institutions in rural thailand to identify impacts we use policies related to the successful unsuccessful provision of services as exogenous variation in effective financial intermediation we find that institutions particularly those with good policies can promote asset growth consumption smoothing and occupational mobility and can decrease moneylender reliance specifically cash lending institutions production credit groups and especially women s groups are successful in providing intermediation and its benefits to members while buffalo banks and rice banks are not the policies identified as important to intermediation and benefits the provision of savings services especially pledged savings accounts emergency services and training and advice surprisingly much publicized policies such as joint liability default consequences or repayment frequency had no measured impacts jel 012 016

the role of the state in financial markets this paper reexamines the role of the state in financial markets and identifies seven major market failures that provide a potential rationale for government intervention in practice government interventions in capital markets even in industrial countries have been pervasive the paper provides a taxonomy of those interventions with respect to both the objectives they serve and the instruments they employ there is a role for the government in financial markets but the success of government interventions has been mixed it is important that interventions be well designed the paper sets out principles for government regulatory interventions and applies them to prudential regulation it then examines three other areas of intervention directed credit finanical repression and competition policy and identifies circumstances in which some amount of financial repression may actually be beneficial

can social cohesion be harnessed to repair market failures evidence from group lending in guatemala the success of group lending in developing countries has been attributed to the ability of the institution to mitigate asymmetric information problems in credit markets previous research has offered a number of explanations for this phenomenon social ties between borrowing group members internal group pressure to repay loans and peer monitoring this research presents empirical tests on borrowing group data from guatemala which indicate that peer monitoring significantly effects borrowing group performance through stimulating intra group insurance group pressure is found to have a small effect in deterring moral hazard while the effect of social ties among members is statistically insignificant

micro credit in chiapas mexico poverty reduction through group lending micro credit mc programs lend money to poor borrowers using innovative mechanisms such as group lending under joint liability while successfully accounting for the presence of asymmetric information in underdeveloped financial markets mc programs have achieved what the conventional financial institutions and the government have not been able to lend to the poor impressive loan recuperation and a positive impact in poverty reduction this article analyzes the performance of alsol an mc program in chiapas mexico for 2151 participants in urban and rural areas for the time period between july 2000 and july 2001 while loan recuperation is high 95 administrative costs also remain high socially responsible lenders and donors play a key role in providing continuous funding to mc programs and assisting in reducing the level of poverty

peer monitoring and credit markets a major problem for institutional lenders is ensuring that borrowers exercise prudence in the use of the funds so that the likelihood of repayment is enhanced one partial solution is peer monitoring having neighbors who are in a good position to monitor the borrower be required to pay a penalty if the borrower goes bankrupt peer monitoring is largely responsible for the successful financial performance of the grameen bank of bangladesh and of similar group lending programs elsewhere but peer monitoring has a cost it transfers risk from the bank which is in a better position to bear risk to the cosigner in a simple model of peer monitoring in a competitive credit market this article demonstrates that the transfer of risk leads to an improvement in borrowers welfare

dynamic microlending under adverse selection can it rival group lending we derive an optimal lending contract in a two period adverse selection model with limited commitment on the borrower side the contract involves penalty interest rates after default and favorable rates after success under some conditions it also charges first time borrowers higher rates than repeat borrowers as in relationship lending because the lender is constrained to keep borrowing attractive while using revealed information to price for risk we compare the efficiency of a group lending contract of the kind popularized by the microcredit movement to the dynamic individual contract both types of contracts reveal the same information but the contracts face different constraints on using the information to improve risk pricing as a result either type of contract can lead to greater efficiency depending on specifics of the environment opening the possibility that dynamic lending has played a role comparable to that of group lending in the success of microcredit we also characterize the optimal dynamic group contract when both lending techniques are feasible and find that it combines both approaches but with varying emphases a recurrent theme is that in more marginal environments dynamic lending performs relatively better than and is prioritized over group lending we also discuss a number of extensions including spatially and serially correlated risk and the effect of competition

statistical dynamics and economics abstract it is shown in this paper how complex economic dynamics can be characterized using the statistical or distributional theory of dynamical systems the basic concepts of the latter are summarized then applications to supply and demand adjustments in competitive markets aggregate business fluctuations and economic growth in the very long run are briefly reviewed

the demand for microinsurance a literature review summary microinsurance has recently received much attention as a promising tool to protect poor individuals from important shocks yet voluntary demand from people has been low shedding doubt on the viability of microinsurance as a useful risk management tool to better understand this puzzle this paper reviews both the theoretical and empirical literature on the demand for insurance while people s lack of understanding of insurance does seem to limit the demand for it several more fundamental factors such as price quality limited trust in the insurer and liquidity constraints also seem to have an important role in explaining the puzzle

dis advantages of informal loans theory and evidence abstract we study borrowers choice between formal and informal credit in a setting with imperfect debt enforcement in contrast to formal loans e g from banks informal loans e g from friends or relatives can be enforced by the threat of severing social ties if the underlying social capital is sufficiently large we show that informal loans carry lower interest rate and collateral than formal loans including the possibility of zero interest and collateral this makes informal credit a priori more attractive to borrowers at the same time since physical collateral is divisible unlike the social capital pledged in informal credit default on formal loans is less costly to both parties than default on informal loans because of this trade off formal and informal credit can co exist depending on the loan riskiness measured by the ratio of loan size to borrower s wealth ltw ratio borrowers choose formal credit for riskier larger loans while informal credit is preferred for smaller projects with low default risk empirical results using household data from rural thailand are consistent with the predicted choice pattern and terms of formal and informal credit

bank firm relationships and allocative efficiency in northeastern and central italy and in the south abstract we make two contributions on the extent and impact of relationship banking based on close and long lasting bank firm customer relationships in the three sub systems in which italy may be subdivided first we show that relationship banking is more extensive in both sub systems where small businesses prevail the fast growing northeast and center nec and the south the marginal area of dependent development second we demonstrate that relationship banking improves the allocation of credit in the nec but worsens it in the south this evidence suggests that relationship banking may be beneficial or detrimental depending on the socio economic structure

repayment performance in group based credit programs in bangladesh an empirical analysis abstract this paper analyzes the repayment rates of 128 credit groups belonging to three group based credit programs in bangladesh the association for social advancement asa the bangladesh rural advancement committee brac and the rangpur dinajpur rural service rdrs using tobit analysis specific tests are performed on the following hypothesized determinants group size size of loans degree of loan rationing enterprise mix within groups demographic characteristics social ties and status and occurrence of idiosyncratic shocks the paper concludes that if basic principles of prudential banking are adhered to repayment rates can be good even in poor and remote communities the important thing for financial institutions is to tailor services such that it becomes worthwhile for the poor to establish a profitable long term association in addition more freedom to members in the process of group formation is recommended

exchange rate fluctuations and stability in the oil market abstract this paper attempts to assess the impact of exchange rate fluctuations on the ability of opec to stabilize the oil market since oil prices are denominated in us dollars changes in the exchange rate parity influence the cost of imported oil of major european countries and japan which in turn influences the demand for oil and eventually demand for opec oil these variations become important factors for the stability of the market when opec output is at either maximum or minimum limits of the organization s production capacity

the us dollar and the world oil market abstract due to the increasing value of the dollar world oil prices rose rather than fell relative to the price of oecd exports between 1980 and 1984 the real crude oil price of oecd countries increased by approximately 30 more than its counterpart for the usa this paper calculates that if oecd oil prices had not risen but followed the trend for us prices world oil demand in 1984 would have been about 3 million barrels per day 6 6 higher than otherwise two plausible scenarios which assume the same nominal oil price us inflation rate and oecd growth rate but different values for the dollar are considered world oil consumption by 1990 could vary by 4 million barrels per day depending upon shifts in the exchange rates and the value of the dollar this variation is comparable to the range associated with significant differences in the economic growth rate between now and 1990 the paper shows that shifts in exchange rates could produce changes in oil prices in 1990 comparable to the effects of gradually removing 5 million barrels per day from total oil production by 1990

liability structure in small scale finance evidence from a natural experiment microfinance the provision of small individual and business loans has witnessed dramatic growth reaching over 150 million borrowers worldwide much of its success has been attributed to overcoming the challenges of information asymmetries in uncollateralized lending yet very little is known about the optimal contract structure of such loans there is substantial variation across lenders even within a particular setting this paper exploits a plausibly exogenous change in the liability structure offered by a microfinance program in india which shifted from individual to group liability lending the analysis finds compelling evidence that contract structure matters for the same borrower required monthly loan installments are 6 percent less likely to be missed under the group liability setting relative to individual liability in addition compulsory savings deposits are 19 percent less likely to be missed under group liability contracts

the life cycle of a microfinance institution the irish loan funds abstract ireland s loan funds were a long lived self sustaining large scale microfinance organization that made millions of loans without collateral to the poor during the first 100 years of their life cycle a period of growth ending in the 1840s they adapted constantly and obtained improvements to their legal structure because they were complementary to the banking system and seen as effective in relieving poverty in their 2nd century they became ossified in part because of competition with commercial banks the loan funds provide an example of sustainable microfinance under harsh economic conditions and illustrate how organizations change incrementally and when successful alter their institutional framework

credit access human capital and class structure mobility this article examines the impact of microenterprise credit programmes on class structure mobility in developing countries it develops a model that endogenously generates an eight fold class structure class membership is determined by optimal choice of labour activity which is a function of access to credit and human capital endowments predictions from the model suggest that better access to credit will foster upward class mobility among self employed entrepreneurs and that this upward class mobility will be accentuated among entrepreneurs with high levels of human capital theoretical predictions from the model are compared with data on class structure mobility collected first hand in western guatemala empirical results show that upward class structure mobility increases substantially with access to credit and also suggest that the combined effect of innate entrepreneurial ability and credit access has a greater impact on upward class structure mobility than the interaction between formal schooling

migrants ancestors and foreign investments we use 130 years of data on historical migrations to the u s to show a causal effect of the ancestry composition of u s counties on foreign direct investment fdi sent and received by local firms to isolate the causal effect of ancestry on fdi we build a simple reduced form model of migrations migrations from a foreign country to a u s county at a given time depend on 1 a push factor causing emigration from that foreign country to the entire u s and 2 a pull factor causing immigration from all origins into that u s county the interaction between time series variation in origin specific push factors and destination specific pull factors generates quasi random variation in the allocation of migrants across u s counties we find that doubling the number of residents with ancestry from a given foreign country relative to the mean increases the probability that at least one local firm engages in fdi with that country by 4 percentage points we present evidence that this effect is primarily driven by a reduction in information frictions and not by better contract enforcement taste similarities or a convergence in factor endowments

which microfinance institutions are becoming more cost effective with time evidence from a mixture model italian speakers tend to stress the second component of german morphologically complex words such as compounds and prefix verbs even if the first component is lexically stressed to improve their prosodic phrasing an automatic pronunciation teaching method was developed based on auditory feedback of prosodically corrected utterances in the learners own voices basically the method copies contours of f0 local speech rate and intensity from reference utterances of a german native speaker to the learners speech signals it also adds emphasis to the stress position in order to help the learners better recognise the correct pronunciation and identify their errors a perception test with german native speakers revealed that manipulated utterances significantly better reflect lexical stress than the corresponding original utterances thus two groups of italian learners of german were provided with different feedback during a training session one group with manipulated utterances in their individual voices and the other with correctly pronounced original utterances in the teacher s voice afterwards both groups produced the same sentences again and german native speakers judged the resulting utterances resynthesised stimuli especially with emphasised stress were found to be a more effective feedback than natural stimuli to learn the correct stress position since resynthesis was obtained without previous segmentation of the learners speech signals this technology could be effectively included in computer assisted language learning software

world oil market simulation most of the models used to analyse the world oil market can be categorized under two broad headings i recursive simulation models and ii intertemporal optimization models 1 both types assume that opec operates as a cartel although the way in which opec behaviour is modelled varies

microcredit social capital and common pool resources abstract the paper presents a conceptual scheme for understanding the impact of microcredit small loans to poor borrowers on common pool resources impacts on common pool resources are posited to occur through changes in household production and consumption the focus on women and the social capital created from group training decision making and risk bearing with the group lending techniques characteristic of many microcredit programs enhanced human and social capital can improve environmental outcomes a nonrandom survey of microfinance organizations suggests increased environmental awareness and potential cpr stewardship through microcredit but empirical research is needed to demonstrate actual impacts

institutions economics and the development quest institutions crucial for the analysis of how agents deal with uncertainty have been gaining increasing relevance on the economic research agenda in this paper we analyze the institutional literature aiming to explain why this perspective obtains better results than others in development economics in particular we stress the relevance of new institutional economics as an adequate framework for a broad understanding of development issues

group lending sequential financing lender monitoring and joint liability abstract we develop a simple model of group lending based on peer monitoring and moral hazard we find that in the absence of sequential financing or lender monitoring group lending schemes may involve under monitoring with the borrowers investing in undesirable projects moreover under certain parameter configurations group lending schemes involving either sequential financing or a combination of lender monitoring and joint liability are feasible in fact group lending schemes with sequential financing may succeed even in the absence of joint liability though the repayment rate will be lower in the absence of joint liability however group lending with lender monitoring is unlikely to be feasible

the impact of microcredit borrowing on household consumption in bangladesh the rapid expansion of microcredit in recent years renders knowledge of its impact on poverty critical unfortunately empirical investigations have been limited by endogeneity issues and randomiz

a matter of relational style loan officer consistency and exchange continuity in microfinance social scientists have long considered what mechanisms underlie repeated exchange three mechanisms have garnered the majority of this attention formal contracts relational contracts and relationally embedded social ties although each mechanism has its virtues all three exhibit a common limitation an inability to fully explain the continuation and stability of intertemporal exchange between individuals and organizations in the face of change drawing on extensive quantitative data on approximately 450 000 microfinance loans made by a microfinance institution in mexico from 2004 to 2008 that include random assignment of loan officers this research proposes the concept of relational styles to help explain how repeated exchange is possible in the face of personnel change we define relational styles as systematically reoccurring patterns of interaction employed by social actors within and across exchange relationships in this paper between microfinance clients and loan officers we show that relati

symposium on organizations and economics m t r ost production in modern economies occurs within organizations and this production is regulated only to a limited extent by prices the size of some of the largest organizations like general motors or ibm or att if managers didn t they would be replaced and firms that didn t maximize value wouldn t survive accordingly what went on inside the black box was mere detail the behavior of the firm could be described completely without knowledge of those details

risk rationing and wealth effects in credit markets theory and implications for agricultural development we develop a model that shows that asymmetric information can result in two types of credit rationing conventional quantity rationing and risk rationing whereby farmers are able to borrow but only under high collateral contracts that offer them lower expected well being than a safe subsistence activity after exploring its incidence with respect to wealth we show that risk rationing has important policy implications specifically land titling will be only partially effective because it does not enhance producers willingness to offer up the collateral needed to secure loans under moral hazard constraints efforts to enhance agricultural investment and the working of agricultural credit markets must step beyond land titling and also deal with risk copyright 2008 oxford university press

labor turnover wage structures and moral hazard the inefficiency of competitive markets a multiperiod general equilibrium model of the labor market is developed in which risk averse workers are faced with job related uncertainty and labor turnover is costly if a worker is unlucky and suffers a bad job match he quits and joins another firm hoping that he will like its work environment more because the quality of a job match is unobservable workers cannot insure against the risk of a bad match the firm provides implicit insurance against job dissatisfaction typically by paying workers more than their net marginal products in their early years with the firm and less subsequently since the probabilities of the insured against events the quit rates over time are affected by the amount of such insurance provided this implicit insurance is characterized by moral hazard individuals quit when in the absence of insurance they would not the equilibrium contract balances out efficiency in risk bearing with efficiency in turnover incentives we show that the equilibrium contract is not con