socio geographic perception in the diffusion of innovation solar energy technology in sri lanka abstract understandings of the diffusion process have tended to emphasize either the adoption perspective which focuses on individual characteristics or the market perspective which focuses on institutional context in this paper we bring these two perspectives together by recognizing that people are embedded in socio geographic contexts that affect their perceptions of their situations which in turn shape the innovativeness of individuals and places focusing on the diffusion of solar home systems shs in sri lanka we explore the role of context at the village by comparing adoption rates among villages and individual by comparing time to adoption among household decision makers in a case study village scales at the village scale we find that expectations of government policy based on interactions related to ethnicity and politicians previous power grid connection promises are significant drivers of shs adoption along with perceived tolerance levels in the village for non conformist behavior among household decision makers within the case study village we analyze relative adoption time and the duration of the innovation decision process and find that perceiving strong village level social control inhibits shs adoption decision making the results add to innovation diffusion theory and provide policy recommendations for agencies promoting solar energy in developing countries

precautionary savings and self selection evidence from the german reunification experiment in the absence of complete insurance expected future income shocks lead prudent individuals to build up precautionary savings in order to avoid wide fluctuations in the consumption path the reaction of savings to expected future shocks is stronger the more risk averse an individual is risk aversion might influence not only the savings behavior of an individual facing a stochastic income path but it can also affect occupational choice in the first place in particular risk averse individuals might choose occupations that are associated with less risky income paths while less risk averse individuals might prefer occupations with higher income risk assessing the importance of self selection of individuals into occupations according to their risk aversion is difficult since risk aversion is usually unobserved yet failing to control for unobserved risk aversion in regressions of wealth on measures of labor income risk will lead to a bias if selfselection takes place since measures of labor income risk will be negatively correlated with the error term that is capturing the unobserved risk aversion this could lead to a rejection of the theory of precautionary savings even if individuals act according to the theory

consumption commitments and employment contracts we examine an economy in which the cost of consuming some goods can be reduced by making commitments that reduce exibility we show that such consumption commitments can induce consumers with risk neutral underlying utility functions to be risk averse over small variations in income but sometimes to seek risk over large variations as a result optimal employment contracts will smooth wages conditional on being employed but may incorporate a possibility of unemployment

solvency constraint underdiversification and idiosyncratic risks contrary to the prediction of the standard portfolio diversification theory many investors place a large fraction of their stock investment in a small number of stocks i show that underdiversification may be caused by solvency requirements my model predicts that for quite general preferences and return distributions 1 underdiversification decreases in discretionary wealth and 2 expected return and covariance determine which stocks to invest in but variance higher moments and sharpe ratio do not matter for this choice in addition a less diversified stock portfolio has a higher expected return a higher volatility and a higher skewness and idiosyncratic risks are priced

lottery dependent utility in this paper we propose a model for decision making under risk that is capable of predicting empirically observed preference patterns that have been found to be incompatible with the expected utility model the model departs from the classical expected utility model by allowing utilities to depend on the lottery the dependence of utilities on the lottery being evaluated is achieved by restricting the utility measure to a convenient parametric family of functions the idea then is to use each lottery to determine a specific parameter value thus characterizing the utility function for each particular lottery the expected value of this lottery dependent utility function provides the overall measure of preference the model retains the properties of transitivity stochastic dominance and continuity it also permits types of analyses such as exploitation of basic attitudes toward risk through risk aversion properties that have been found useful in decision theory the primary use of our model is in descr

trust interlinking transactions and credit in the industrial district an essential feature of the industrial district is trust among individuals and firms within it this paper focuses mainly on trust based on investments in building up a good reputation that is a personal capital that can even substitute for collateral in obtaining credit informal credit often linked to other transactions and especially subcontracting is therefore an important way of financing economic development in the industrial district moreover the importance of trust as personal capital gives rise to a double financial intermediation in the industrial district this double intermediation constitutes a device to reduce information problems that are usually responsible for credit rationing c 1994 academic press inc copyright 1994 by oxford university press

networks trust and innovation in tanzania s manufacturing sector abstract the social dimensions of innovation are examined for a group of manufacturers in mwanza tanzania social networks of businesspeople in mwanza are found to support innovation in manufacturing firms trust in these relations is especially important as it improves the quality of information exchanges and encourages the development of strong intracommunity ties and weak intercommunity relations a typology of manufacturers demonstrates how different social strategies relate to innovation the findings suggest that openness to social relations enhances innovation but that weak formal institutions discourage manufacturers from extending their social relations beyond core networks

buyers pricing behavior for risky alternatives encoding processes and preference reversals numerous studies have examined individuals minimum selling prices or certainty equivalents for lotteries as measures of preference but few have examined maximum buying prices because every transaction involves a buyer as well as a seller buyers pricing behavior is of interest in its own right two prospect theory based descriptive models of maximum buying prices the integration and segregation models are developed from different assumptions about cognitive encoding processes the models were tested experimentally using an incentive compatible cash payoff scheme in which maximum buying prices for bets and choices between bets were elicited from subjects surprisingly observed maximum buying prices were far below expected values even for bets with probabilities of winning near 1 0 this suggests buyers are strongly influenced by loss aversion and that the conventional assumption that the buying price for a risky alternative is a reduction in the alternative s payoffs fails to describe behavior instead it appears subjects predominately employed a segregation encoding process in which the buying price was encoded separately from the bet s payoffs and treated as a sure loss however an additional result was not explained adequately by either encoding model buying prices were less risk averse than choices for 3 expected value bets creating preference reversals of the standard kind lichtenstein and slovic 1971 but more risk averse for 100 expected value bets creating reverse preference reversals casey 1991 implications for the scale compatibility principle tversky et al 1988 are discussed two theoretical approaches are outlined which offer promise in the development of a unified model of price judgments and choice preferences under risk

household saving micro theories and micro facts in this survey we review the recent theoretical and empirical literature on household saving and consumption the discussion is structured around a list of motives for saving and how well the standard theory captures these motives we show that almost all of the motives for saving that have been suggested in the informal saving literature can be captured in the standard optimizing model particular attention is given to recent work on the precautionary motive and its implications for saving and consumption behavior we also discuss the behavioral or psychological approach that eschews the use of standard optimization techniques and focuses instead on direct consideration on saving we provide a section on facts who save and how much we then discuss informally the recent decline in the u s saving rate and whether the theory is of much use in understanding this and other changes in aggregate saving rates over time we do not find any convincing explanation for the change in saving rates we also discuss some analyses of saving behavior over the life cycle addressing such questions as whether households save enough for retirement and whether the consumption patterns of older households can be rationalized within a simple life cycle model we also review a great number of studies of the consumption euler equations based on our analysis of the studies cited we conclude that there is still mixed evidence that consumption is excessively sensitive to income we also examine in depth the recent empirical literature on the precautionary motive we conclude that although some households do seem to have a significant precautionary motive at some points in their life cycle this motive is not so strong empirically as some investigators suggest

the nature of precautionary wealth abstract this paper uses the panel study of income dynamics to provide some of the first direct evidence that wealth is systematically higher for consumers with predictably greater income uncertainty however the apparent pattern of precautionary wealth is not consistent with a standard parameterization of the life cucle model in which consumers are patient enough to begin saving for retirement early in life wealth is estimated to be far less sensitive to uncertainty than implied by that model instead our results suggest that over most of their working life time consumers behave in accordance with the buffer stock models of saving described in carroll 1992 1997 or deaton 1991 in which consumers hold wealth principally to insulate consumption against near term fluctuations in income

the effect of housing on portfolio choice we show that characterizing the effects of housing on portfolios requires distinguishing between the effects of home equity and mortgage debt we isolate exogenous variation in home equity and mortgages by using differences across housing markets in house prices and housing supply elasticities as instruments increases in property value holding home equity constant reduce stockholdings while increases in home equity wealth holding property value constant raise stockholdings the stock share of liquid wealth would rise by 1 percentage point 6 of the mean stock share if a household were to spend 10 less on its house holding fixed wealth

unemployment insurance and precautionary saving abstract models of precautionary saving imply that households will hold more assets when faced with greater income uncertainty however previous empirical studies of income uncertainty have produced somewhat mixed support for the precautionary saving hypothesis in this paper we note that differences in the state contingent income stream available to workers through the unemployment insurance ui program provides an excellent source of variation for testing the presence of a precautionary savings motive simulations of a stochastic life cycle model suggest that a ui system similar to the type currently in place in the u s can lead to a significant reduction in the assets accumulated by a median worker moreover there is considerable variation in the ui benefit schedules for workers living in different states in the u s which provides an exogenous source of variation for empirically testing the precautionary saving hypothesis we carry out this test using data on expected ui benefit replacement rates and financial assets held by households in the survey of income and program participation our empirical results are consistent with the predictions of the model and suggest that reducing the ui benefit replacement rate by 50 percent would increase gross financial asset holdings by 14 percent or 241 for the average worker we also find empirical evidence that this crowd out effect of ui on household saving is stronger for those facing higher unemployment risk and weaker for older workers both of which are implications from our precautionary saving model

precautionary savings a panel study theoretical literature shows that income uncertainty boosts saving yet empirical work is incomplete i test for the precautionary motive for saving using panel data knowing this motive s size is important for gauging the responsiveness of saving to government programs that reduce uncertainty and for comparison to other motives such as bequests most empirical studies of precautionary saving use either aggregate time series or cross sectional data which cannot capture the effects of individual income uncertainty i derive measures of total permanent and transitory income uncertainty from panel data the national longitudinal survey and find a strong precautionary motive a doubling of uncertainty increases the ratio of wealth to permanent income by 29

consumer durables and inertial behaviour estimation and aggregation of s s rules for automobile purchases the s s model originally introduced in the study of inventories see arrow et al 1951 scarf 1959 has recently received renewed attention both in the durable consumption and in the investment and labour demand literatures caballero 1993 for instance appeals to these type of models to explain the time series properties of durable expenditure and in particular the persistence or slow adjustment of such a variable in this paper i model the purchase behaviour of automobiles by u s households as an s s rule i estimate a flexible specification of such a rule using a large microeconomic data set and study some of the aggregate implications of this type of inertial behaviour the paper is one of the first attempts at estimating directly the parameters of an s s rule using micro data because of this some of the methodological issues concerning the specification and the estimation of s s rules are relevant for many potential applications furthermore the paper is one of the first to discuss and quantify the aggregate implications of an s s rule estimated on micro data in the presence of non convex transaction costs a full and consistent characterization of individual behaviour is very hard and typically requires strong restrictions grossman and laroque 1991 prove that an s s rule is optimal for a consumption and investment problem under very special circumstances some of their results were extended by eberly 1991 and beaulieu 1993a b eberly 1991 in particular has derived some closed form solutions for durable consumption in the presence of transaction costs while caballero and engel 1994 construct a model of investment where an s s rule is optimal the main problem with these theoretical results is that it is only possible to show optimality of s s rules under very stringent conditions in particular a necessary condition to derive them is that the optimization problem faced by an individual consumer can be reduced to a problem with a single state variable unfortunately as pointed out by bar ilan and blinder 1992 even simple generalizations are extremely difficult to analyse

disappointment in decision making under uncertainty decision analysis requires that two equally desirable consequences should have the same utility and vice versa most analyses of financial decision making presume that two consequences with the same dollar outcome will be equally preferred however winning the top prize of 10 000 in a lottery may leave one much happier than receiving 10 000 as the lowest prize in a lottery this paper explores the implications of disappointment a psychological reaction caused by comparing the actual outcome of a lottery to one s prior expectations for decision making under uncertainty explicit recognition that decision makers may be paying a premium to avoid potential disappointment provides an interpretation for some known behavioral paradoxes and suggests that decision makers may be sensitive to the manner in which a lottery is resolved the concept of disappointment is integrated into utility theory in a prescriptive model

tomatoes land and hearsay property and history in asante in the time of structural adjustment abstract after a decade of advocating market based solutions to poverty and underdevelopment in sub saharan africa policy analysts have begun to reexamine the actual and potential role of african states and institutions in promoting sustainable development while stressing the importance of flexibility in policies and institutions much of this debate rests on ahistorical approaches to understanding african institutions which portray them as inflexible and fragile beleaguered by economic and political change rather than contributing to it after reviewing some of the assumptions which inform recent debates this essay argues for a more processual approach which takes account of the negotiability and ambiguity of many institutional arrangements drawing on a case study of recent changes in land rights and agricultural practices in a rural community in ghana

tax subsidies to owner occupied housing an asset market approach inflation reduces the effective cost of homeownership and raises the tax subsidy to owner occupation this paper presents an asset market model of the housing market and estimates how changes in the expected inflation rate affect the real price of houses and the equilibrium size of the housing capital stock simulation results suggest that the accelerating inflation of the 1970s which substantially reduced homeowners user costs could have accounted for as much as a 30 percent increase in real house prices persistent high inflation rates could lead ultimately to a sizable increase in the stock of owner occupied housing

ssb and weighted linear utility as expected utility with suspicion we show that a suspicious subjective expected utility seu maximizer i e one who treats potential consequences of states as information useful in assessing the probability of those states may under reasonable circumstances act as though he were maximizing either weighted linear utility or skew symmetric bilinear ssb utility seu with suspicion therefore explains at least as many empirical violations of seu theory as do these and similar models we give examples to illustrate how several important types of seu violations may seem to arise when suspicion is present

induced preferences nonadditive beliefs and multiple priors we study a decision maker who follows the savage axioms we show that if he or she is able to take unobservable actions that influence the probabilities of outcomes then it can appear to an outsider as if his or her subjective probabilities are nonadditive implications for multiperiod decision are explored we extend the model to include a second individual who is also able to take a hidden action we show that this may induce uncertainty averse preferences over some class of acts even if the second individual acts to help the decision maker with high probability

does unemployment insurance crowd out spousal labor supply previous research on unemployment insurance ui has emphasized the program s effect on individual search behavior this state contingent income may also reduce the labor supply of family members during the unemployment spell we investigate this question within the context of wives labor supply responses to their husbands unemployment spells we find strong crowdout of this form of family self insurance our estimates imply that for each dollar of ui receipt wives earn up to 73 cents less the reduction in spousal hours of work is over 40 as large as previous estimates of the effect of ui on search time of husbands

precautionary saving and subjective earnings variance abstract in this paper i examine a model of precautionary saving and i show that the fact that people may insure against income risk makes it difficult to evaluate the extent of precautionary accumulation by simply looking at the relationship between wealth and earnings variance i also argue that occupations may represent a bad proxy for income risk

crime and social interactions the high variance of crime rates across time and space is one of the oldest puzzles in the social sciences this variance appears too high to be explained by changes in the exogenous costs and benefits of crime we present a model where social interactions create enough covariance across individuals to explain the high cross city variance of crime rates this model provides an index of social interactions which suggests that the amount of social interactions is highest in petty crimes moderate in more serious crimes and almost negligible in murder and rape

networks distance and trust telecommunications development and changing trading practices in ghana summary ghana liberalized its telecommunications sector in 1995 this article examines the impact of the phenomenal growth in access to cell phones on informal traders business practices the study demonstrates how these telecommunication pioneers have changed their mode of operation to reduce both transportation and transaction costs it is argued that traders with access to tools for more efficient communication over long distances provide better services and create a higher profit potential than others it is further argued that adoption of new technology enhances trust building in trade networks thus facilitating a higher number of transactions in an uncertain economic environment

commitment risk and consumption do birds of a feather have bigger nests abstract consumption commitments goods like housing for which adjustment is costly change the relationship between risk and consumption commitment provides a motive to reduce consumption when possible future losses are too small to warrant adjustment but not when losses are large enough that adjustment would be worthwhile this implies conditions under which mean preserving increases in risk can increase housing consumption our empirical evidence exploits the interaction of these conditions with a novel proxy for unemployment risk couples sharing an occupation consistent with our model same occupation couples consume more housing only when adjustment costs are high and potential losses are sufficiently large

the triple c approach to local industrial policy abstract in both developed and developing countries there is mounting evidence that clustering and networking help small and medium sized manufacturers to raise their competitiveness the role of public policy in this process is less clear the european experience suggests that local and regional government can play an important role equally if not more interesting experiences can be found in developing countries their analysis constitutes the core of this paper the lessons can be summarized as the triple c which stands for customer oriented collective and cumulative

how important is intra household risk sharing for savings and labor supply abstract while it is recognized that the family is a risk sharing institution little is known about the quantitative effects of this source of insurance on savings and labor supply in this paper we present a model where workers females and males are subject to idiosyncratic employment risk and where capital markets are incomplete a household is formed by a female and a male who decide on consumption savings and labor supplies in a calibrated version of our model we find that intra household risk sharing has its largest impact among wealth poor households while the wealth rich use mainly savings to smooth consumption across unemployment spells wealth poor households rely on spousal labor supply for instance for low wealth households average hours worked by wives of unemployed husbands are 8 higher than those worked by wives of employed husbands this response in wives hours makes up 9 of lost family income we also study consumption losses upon an unemployment spell precautionary savings and the crowding out effects of the public unemployment insurance program on the extent of risk sharing within the household

collective effects in italian and mexican footwear industrial clusters the focus of this article is on the analysis of the collective economic effects deriving from the intense set of backward forward labor horizontal and institutional linkages existing within clusters of enterprises among the economic effects two main categories are distinguished external economies which are the spontaneous by product of economic activities undertaken within the clusters and cooperation effects which are the results of explicit and deliberate cooperative behaviors of the economic actors

housing choices and labor income risk abstract i show that if there is a negative covariance between the returns to owner occupied housing and the risk of becoming unemployed the housing asset becomes riskier for households to hold in other words if the value of the home tends to fall at the same time as the risk of unemployment increases it is risky to be a homeowner using swedish microdata the findings of my empirical analysis strongly indicate that there is in line with the theoretical predictions a significant positive relationship between households investments in housing and the individually estimated covariance between unemployment risks and returns to housing

assessing farmers risk preferences and their determinants in a marginal upland area of vietnam a comparison of multiple elicitation techniques we examine the consistency of risk preference measures based on eight hypothetical elicitation methods and a lottery game applied to smallholder farmers in a marginal upland environment in vietnam using these measures we identify influencing factors of risk aversion via regression analysis whereby unlike previous studies we include several proxies of social capital such as social networks and norms data were collected from household heads and spouses separately in a random sample of 300 households although correlations between most of the various risk preference measures are all statistically highly significant most are weak on average respondents have a high degree of risk aversion and specific characteristics gender age idiosyncratic shocks education social norms network reliance with extended family and connections to local authorities are significant determinants of risk preferences across most elicitation methods whereas others the household s dependency ratio wealth and covariate shocks are significant in a few methods only the explanatory power of the models is limited indicating that other factors are likely to be of greater importance in determining risk preferences the results can help target safety nets encourage investments and lead to the development of more applicable methods for assessing risk preferences of smallholders in developing countries

collective efficiency growth path for small scale industry this study is concerned with the growth of small local industry in developing countries and explores one particular route for understanding and fostering such growth it focuses on the clustering of firms and the competitive advantage which they derive from local external economies and joint action captured in the concept of collective efficiency following a conceptual discussion the article explores the economic and institutional conditions which enhance or hinder collective efficiency this includes a case study which suggests that responding to opportunity and crisis requires shifting from mere reliance on external economies to joint action and from ascribed to earned trust

labor income housing prices and homeownership abstract this paper tests the intuition that households whose incomes covary relatively strongly with housing prices should own relatively little housing among us households a one standard deviation in covariance between income and home prices is associated with a decrease of approximately 7500 in the value of owner occupied housing this result arises in the presence of controls for the level and distribution of home prices the generally positive correlations between income and home prices suggests that households enter financial markets with a greater exposure to risk than is typically modeled

labor income uncertainty skewness and homeownership a panel data study for germany and spain abstract in this paper we empirically investigate the effect of labor income uncertainty on the probability of homeownership in germany and spain this study is motivated by two facts firstly theoretical models tend to provide ambiguous results on this issue secondly previous empirical evidence focuses exclusively on the us housing market to carry out our analysis we propose more precise income uncertainty measures based on panel data labor income equations we observe that households facing high levels of income uncertainty display a preference for renting while those located in more positively skewed income distributions show a greater propensity for homeownership

trust and inter firm relations in developing and transition economies the role of trust in facilitating economic growth has been highlighted in previous contributions to this journal in order to take this debate forward this article argues 1 that more attention needs to be given to the relationship between sanctions and trust and 2 that it is worth distinguishing between the minimal trust for making markets effective and the extended trust required for deeper kinds of inter firm co operation to work the article goes on to ask why minimal trust is lacking and so hard to construct in the republics of the former soviet union it then examines how extended trust grows or can be made to grow in industrial supply chains and clusters in developing countries

consumption commitments and habit formation we analyze the implications of household level adjustment costs for the dynamics of aggregate consumption we show that an economy in which agents have consumption commitments is approximately equivalent to a habit formation model in which the habit stock is a weighted average of past consumption if idiosyncratic risk is large relative to aggregate risk consumption commitments can thus explain the empirical regularity that consumption is excessively sensitive and excessively smooth findings that are typically attributed to habit formation unlike habit formation and other theories but consistent with empirical evidence the consumption commitments model also predicts that excess sensitivity and smoothness vanish for large shocks these results suggest that behavior previously attributed to habit formation may be better explained by adjustment costs we develop additional testable predictions to further distinguish the commitment and habit models and show that the two models have different welfare implications

homeownership and investment in risky assets abstract this paper uses the 1989 survey of consumer finances to show that committed expenditures related to homeownership cause agents to hold their financial assets in a safe form this work follows theoretical results by fratantoni 5 which show that the mortgage commitment leads to reduced risky asset holding and empirical results by guisoet al 7 which show that agents with uncertain labor income hold fewer risky assets i find that doubling the median homeowner s mortgage payment income ratio leads to a 15 decrease in the risky share

effects of income variability on the demand for owner occupied housing abstract this study investigates whether the uncertainty associated with an income stream affects the demand for owner occupied housing theoretical models yield an ambiguous sign for the direction of change in consumption but our empirical findings are consistent with the hypothesis that the consumption of housing falls when the uncertainty of receipt of income increases specifically in a sample of military employees the income earned by wives had little or no effect on the demand for housing we also find evidence that suggests the demand for housing is affected by pension rights the closer to retirement the stronger the effect

who marries whom in a surging housing market abstract this paper investigates the impact of a surging housing market on marital sorting our empirical analysis shows that there is increasing assortativeness on original family background in response to housing price appreciation that is for husbands when the down payment doubles one more year of paternal schooling predicts a marriage in which the father in law s schooling is 0 057 year greater than in a scenario in which the down payment does not increase the rising assortativeness could exacerbate the already expanding inequality caused by the booming housing market in addition to the benchmark analysis we find that a divorce reform which awards assets proportionate to the shares the spouses paid for the initial down payment rather than awarding equal shares upon divorce alleviates assortativeness the evidence suggests that joint investment in housing is likely to be a significant consideration in marital sorting

behind the market stage where real societies exist part i the role of public and private order institutions this two part article is an attempt to clarify the social conditions upon which the viability and efficiency of the market system rest it strives to show that the embeddedness thesis that is an explanation based upon the existence of long run personal ties involving the use of reputation mechanisms among transactors cannot fully elucidate the question as to how the problem of trust is solved in market societies as explained in part i there are difficulties of both theoretical and empirical historical kinds and these explain why the market order needs to be sustained by private and public order institutions in part ii the role of generalised morality in backing or supplementing such institutions is discussed in the light of game theory and particular emphasis is put on the ability of moral norms to sustain honest behaviour by generating the right kind of preferences and establishing trust the vexed problem of the dynamics of norm emergence and erosion is then addressed with a view to showing

choice under uncertainty problems solved and unsolved ffifteen years ago the theory of choice under uncertainty could be considered one of the success stories of economic analysis it rested on solid axiomatic foundations it had seen important breakthroughs in the analytics of risk risk aversion and their applications to economic issues and it stood ready to provide the theoretical underpinnings for the newly emerging information revolution in economics 1 today choice under uncertainty is a field in flux the standard theory is being challenged on several grounds from both within and outside economics the nature of these challenges and of our profession s responses to them is the topic of this paper

trust networks and norms the creation of social capital in agricultural economies in ghana this paper contributes to the continuing debate over the multifaceted concept of trust and its ability to provide a richer explanation of processes of economic activity using case studies of agricultural production marketing and financing systems in brong ahafo region of ghana the analysis documents the means by which trust is created among farmers traders and agricultural input suppliers the mechanisms include formal and informal networks of working relations customer friendships pre existing networks and intermediaries the study shows that trust is necessary for the development of a vibrant private sector based on microenterprises in conditions where actors cannot rely on formal legal institutions at present

competence and contract in the theory of the firm abstract the coase williamson response to the question why do firms exist is based on the idea that transaction costs in viable firms are lower than they would be if production was coordinated through the market the explanatory focus of this argument is on the diminution of costs related to transactions between given individuals however this ignores the possibility of activities which are in principle non contractible including aspects of the process of production further the reliance on comparative statics in transaction cost theory downplays the distinctive kind and rate of human learning that takes place within firms this paper argues that work on organizational learning and cultural transmission reinforces a competence based explanation of the existence and relative efficiencies of firms and this approach can also provide answers to the original question posed by coase accordingly the development of a research program involving a conjoint evaluation of both competence based and transaction cost approaches is proposed

the approach of institutional economics this paper assesses the old institutional economics it emphasizes the importance of key old institutionalist themes concerning the necessity of habits and rules and the role of institutions a problem in the alternative theoretical program of the new institutionalism is the untenability of its assumption of an original institution free market or state of nature even optimizing behavior requires the prior existence of habits and rules although it still lacks a complete and systematic theory the evolutionary approach of the old institutionalists tackles the problem of the interactive relationship of actor to structure without analytical reduction to one or the other

how prudent are consumers using data from the consumer expenditure survey this paper presents a simple test that provides an explicit estimate of the parameter in the utility function that reflects the strength of the precautionary saving motive the coefficient of relative prudence the test yields a fairly precise estimate of a small precautionary motive in fact the estimate is too small to be consistent with widely accepted beliefs about risk aversion the presence of liquidity constrained households does not appear to explain this finding and there is some evidence that self selection of households into risky environments also cannot explain the results

venture theory a model of decision weights several theories suggest that people replace probabilities by decision weights when evaluating risky outcomes this paper proposes a model called venture theory of how people assess decision weights it is assumed that people first anchor on a stated probability and then adjust this by mentally simulating other possible values the amount of mental simulation is affected by the absolute size of payoffs the extent to which the anchor deviates from the extremes of 0 and 1 and the level of perceived ambiguity concerning the relevant probability the net effect of the adjustment i e up or down vis i vis the anchor reflects the relative weight given in imagination to values above as opposed to below the anchor this in turn is taken to be a function of both individual and situational variables and in particular the sign and size of payoffs cognitive and motivational factors therefore both play important roles in determining decision weights assuming that people evaluate outcomes by a prospect theory value function kahneman and tversky 1979 and are cautious in the face of risk fourteen predictions are derived concerning attitudes toward risk and ambiguity as functions of different levels of payoffs and probabilities the results of three experiments are reported whereas only a subset of the model s predictions can be tested in experiment 1 all fourteen are tested in experiments 2 and 3 using hypothetical and real payoffs respectively several of the model s predictions are not supported in experiment 2 but almost all are validated in experiments 1 and 3 the failures relate to the exact nature of probability payoff interactions in attitudes toward risk and ambiguity for losses the theory and results are discussed in relation to other experimental evidence future tests of the theory alternative models of risky choice and implications of venture theory for explaining further phenomena

malaysian biofuels industry experience a socio political analysis of the commercial environment this study examines the jatropha adoption process in sarawak malaysia a land rich in biological and ethnic diversity but highly impoverished attempts to alleviate poverty through oil palm plantation development resulted in internationally condemned destruction of peat lands sarawak subsequently turned to the inedible low input exportable biodiesel feedstock jatropha this case study argues that jatropha is unlikely to make more significant socio economic contributions than oil palm or other cash crops the analysis suggests that companies use social capital to aggressively expand their jatropha business among the native population in order to gain access to native customary lands which are often underproductive peat lands global biofuels sector development dynamics are examined through the lenses of political economics and social agricultural and energy studies the research finds that farmers 39 decisions to participate in the biofuels global value chain may result in negative income effects household food security reduction and biodiversity loss from peat land destruction the paper concludes with a proposal for an alternative approach to evaluate both social and financial drivers in order to prevent the negative effects of biofuel based agribusiness on human and environmental systems c 2012 elsevier ltd all rights reserved

adjustment of consumers durables stocks evidence from automobile purchases this paper tests an optimal s s rule in household durable purchases and examines directly the resulting aggregate expenditure dynamics the observed decision rule responds to income uncertainty and growth as predicted by an s s model resulting from transactions costs tests against liquidity constraints find that about half the households purchase according to an optimal s s rule aggregating the s s rule over households produces a cross section distribution of durables holdings the empirical distribution is similar to that predicted theoretically as is its response to aggregate shocks furthermore simulations of aggregate expenditure based on the household distribution exhibit dynamics consistent with those observed in the 1980s

shocks stocks and socks smoothing consumption over a temporary income loss we investigate how households in temporarily straitened circumstances due to an unemploy ment spell cut back on expenditures and how they spend marginal dollars of unemployment insurance ui benefit our theoretical and empirical analyses emphasize the importance of allowing for the fact that households buy durable as well as non durable goods the theoretical analysis shows that in the short run households can cut back significantly on total expenditures without a significant fall in welfare if they concentrate their budget reductions on durables we then present an empirical analysis based on a canadian survey of workers who experienced a job separation exploiting changes in the unemployment insurance system over our sample period we show that cuts in ui benefits lead to reductions in total expenditure with a stronger impact on clothing than on food expenditures our empirical strategy allows that these expenditures may be non separable from employment status the effects we find are particularly strong for households with no liquid assets before the spell started these qualitative findings are in precise agreement with the theoretical predictions jel d11 d12 d91 j65 2009 by the european economic association

new evidence on excess sensitivity of household consumption the monthly salaries and allowances of korean government employees are known in advance but vary greatly throughout the year using a korean monthly panel data set the present study examines how nondurable consumption expenditures in households headed by government employees respond to predictable income changes the study finds a moderate excess sensitivity in consumption that can be attributed to about 9 of the households further analysis shows that these 9 of the households have lower committed expenditures and are likely inattentive consumers

uncertainty and consumer durables adjustment we characterize infrequent durables stock adjustment by consumers who also derive utility from non durable consumption flows in the presence of idiosyncratic income uncertainty the data we analyse include subjective future income uncertainty measures which we use as instruments in the estimation of relevant parameters of heterogeneous consumers dynamic adjustment problems the data feature two conceptually distinct sources of variation cross sectional heterogeneity of the sampled households dynamic problems and history dependent heterogeneity in their situation during the observation period we note that the latter should affect the likelihood but not the size of stock adjustment decisions and find broad support for theoretical predictions in formal selection controlled regressions based on this insight

market institutions trust and norms exploring moral economies in nigerian food systems informal market institutions and small scale traders are responsible for feeding nigerian cities this study analyses a range of economic relationships and institutions that have evolved in the context of inadequate formal institutions such as banks and legal contracts through examining both personal relationships and institutional based trust the paper explores the role of moral norms trust is shown to be related to sanctions information on other parties and a range of norms that are drawn on both calculatively and habitually the perceived moralities of different forms of institution such as credit systems trader associations and commission agents are also examined

precautionary saving in the small and in the large the theory of precautionary saving is shown to be isomorphic to the arrow pratt theory of risk aversion making possible the application of a large body of knowledge about risk aversion to precautionary saving and more generally to the theory of optimal choice under risk in particular a measure of the strength of the precautionary saving motive analogous to the arrow pratt measure of risk aversion is used to establish a number of new propositions about precautionary saving and to give a new interpretation of the dreze modigliani substitution effect copyright 1990 by the econometric society

trade credit in zimbabwean manufacturing abstract credit from suppliers is an important but often neglected source of finance for manufacturing firms zimbabwe is no exception unlike credit from financial institutions trade credit does not rely on formal collateral but on trust and reputation contract enforcement is flexible network effects and statistical discrimination affect the screening of trade credit applicants black entrepreneurs are disadvantaged by their lack of business contacts and by the difficulty of distinguishing themselves from the mass of financially insecure and short lived african owned businesses in zimbabwe a vicious circle is created between weak financial base unreliability as a debtor and inability to gain access to credit

from ascribed to earned trust in exporting clusters abstract this paper is concerned with the role of trust in export manufacturing it asks how trust has developed in two industrial clusters which are located in developing countries and export most of their output to north america and europe the main conclusion is that trust was based initially on socio cultural ties between clustered firms and later on conscious investments in inter firm relationships