a simple estimator for simultaneous models with censored endogenous reggressors this paper presents a simple two step estimator for models with censored endogenous regressors and sample selection bias the approach unifies the literature on censored endogenous regressors and sample selection bias and provides extensions the procedure employs generalized residuals to adjust for the inconsistency caused by the endogeneity of the censored regressors the paper also provides two new tests of weak exogeneity an empirical example examining the trade off between fringe benefits and wages indicates that the estimation procedure works well a monte carlo experiment suggests that the proposed tests have good power properties copyright 1993 by economics department of the university of pennsylvania and the osaka university institute of social and economic research association

smallholder market participation concepts and evidence from eastern and southern africa abstract this paper reviews the evidence on smallholder market participation with a focus on staple foodgrains i e cereals in eastern and southern africa in an effort to help better identify what interventions are most likely to break smallholders out of the semi subsistence poverty trap that appears to ensnare much of rural africa the conceptual and empirical evidence suggests that interventions aimed at facilitating smallholder organization at reducing the costs of intermarket commerce and perhaps especially at improving poorer households access to improved technologies and productive assets are central to stimulating smallholder market participation and escape from semi subsistence poverty traps macroeconomic and trade policy tools appear less useful in inducing market participation by poor smallholders in the region

agricultural marketing by smallholders in kenya a comparison of maize kale and dairy abstract research has demonstrated that commercializing smallholder agricultural production is one of the effective ways to boost farmer incomes employ labor and stimulate rural economies in sub saharan africa but this differs by commodity we use panel data covering over a decade to estimate output supply functions for smallholder farmers in kenya and compare these among three commodities with distinctive product attributes maize kale and milk we find that despite improved market access over the decade there is little discernible growth in market participation except in the case of milk a minority of households consistently sell from year to year and market concentration remains high across all the commodities indicating that production is largely subsistence nevertheless there is greater market orientation and less market concentration in kale and milk than in maize for all the commodities market participation is strongly associated with access to land productive assets technology use expected prices and rainfall amount and reliability we argue that broad based smallholder market participation can only be realized through interventions that raise smallholder production of marketable surpluses through raising productivity and this cuts across even the high value sub sectors such as horticulture and dairy also essential alongside such interventions are strategies to improving market access by reducing transaction costs

option pricing and foreign investment under political risk abstract the paper analyses asset prices in a context of uncertainty over future government policy as current policy is maintained perceived risk abates thus leading to a gradual appreciation of asset prices and a gradual decrease in their conditional variance option values computed under this process have time series and the term structure of conditional volatility which in general are downward sloping in price series without a policy reversal implied volatility from option prices will exceed actual volatility with this wedge progressively disappearing this may be viewed as the volatility analogue of the peso premium for assets subject to large infrequent price drops

marketed surpluses of agricultural households in sierra leone an agricultural household model is used with household level data from sierra leone to estimate elasticities of marketed surplus for several outputs and for labor with respect to price and nonprice variables positive own price elasticities are found with magnitudes considerably above own price output elasticities changes in household characteristics and production technology also affect marketed surpluses but not always in anticipated directions elasticities are reported for households when grouped by their total expenditure not just for the sample mean the differences are important showing that low expenditure households respond as much as high expenditure households

rural infrastructure transactions costs and market participation in kenya abstract we develop a conceptual framework for quantifying fixed transactions costs facing semisubsistence households using household survey data from a sample of 324 kenyan maize farmers we jointly estimate household supply and demand schedules and transactions costs econometric results indicate that on average the ad valorem tax equivalent of fixed transactions costs for households in our sample is 15 additional analysis indicates that economic isolation is positively associated with the size of transactions costs to the best of our knowledge ours are the first empirical estimates of the magnitude of fixed transactions costs for agricultural households in developing countries

the economics of poverty traps and persistent poverty an asset based approach abstract longitudinal data on household living standards open the way to a deeper analysis of the nature and extent of poverty while a number of studies have exploited this type of data to distinguish transitory from more chronic forms of income or expenditure poverty this paper develops an asset based approach to poverty analysis that makes it possible to distinguish deep rooted persistent structural poverty from poverty that passes naturally with time due to systemic growth processes drawing on the economic theory of poverty traps and bifurcated accumulation strategies this paper briefly discusses some feasible estimation strategies for empirically identifying poverty traps and long term persistent structural poverty as well as relevant extensions of the popular foster greer thorbecke class of poverty measures the paper closes with reflections on how asset based poverty can be used to underwrite the design of persistent poverty reduction strategies

programme evaluation with multiple treatments this paper reviews the main identification and estimation strategies for microeconometric policy evaluation particular emphasis is laid on evaluating policies consisting of multiple programmes which is of high relevance in practice for example active labour market policies may consist of different training programmes employment programmes and wage subsidies similarly sickness rehabilitation policies often offer different vocational as well as non vocational rehabilitation measures first the main identification strategies control for confounding variables difference in difference instrumental variable and regression discontinuity identification are discussed in the multiple programme setting thereafter the different nonparametric matching and weighting estimators of the average treatment effects and their properties are examined download discussion paper pdf 484 kb

explaining smallholder maize marketing in southern and eastern africa the roles of market access technology and household resource endowments research on household food grain sales behavior in developing countries has tended to focus on the roles of market access and prices to explain why many rural households do not sell staple crops though recent literature suggests that low household asset endowments may also be key constraints we use econometric analysis of panel data from smallholders in kenya mozambique and zambia to inform the design of public investments that will enable smallholders to increase their maize sales results show that investments that raise farm level productivity and land access are an essential complement to investments that improve market access

going green does it depend on education gender or income sustainable development entails meeting our present needs without compromising the ability of future generations to meet their needs this requires us to treat economic social and environmental aspects in an integrated way but little is known about the nature of individual preferences towards the trade offs involved in this effort for the first time we study individual preferences towards the environment social well being and financial well being by using a survey of over 1400 households in the netherlands using nonparametric parametric and matching methods we find that gender and education are important factors for sustainability rather than income levels moreover results indicate that educated females put the greatest value on going green whilst being socially minded

reputation and imperfect information abstract a common observation in the informal literature of economics and elsewhere is that is multistage games players may seek early in the game to acquire a reputation for being tough or benevolent or something else but this phenomenon is not observed in some formal game theoretic analyses of finite games such as selten s finitely repeated chain store game or in the finitely repeated prisoners dilemma we reexamine selten s model adding to it a small amount of imperfect or incomplete information about players payoffs and we find that this addition is sufficient to give rise to the reputation effect that one intuitively expects

measuring heterogeneity survey engagement and response quality in preferences for organic products in nigeria abstractthe identification of the market potentials of organic products is important in the drive towards a sustainable agricultural development in sub saharan africa ssa however available evidence shows that valuing attributes of credence goods such as organic products while using stated preference methods faces additional obstacles compared to other normal goods in this study we examine consumers preferences and willingness to pay wtp for health and environmental attributes of organic products in nigeria we employ an approach that allows us to adequately capture the value of organic products by linking part of the heterogeneity across respondents to differences in scale while making use of indicators of survey engagement without risks of endogeneity bias and measurement error that arise from the deterministic methods the empirical results show that market for organic products exists in nigeria with reduction in pesticide residues attribute attracting the highest value followed by the ce

investing without credible inter period regulations a bargaining approach with application to investments in natural resources abstract a government s lack of credibility when promising future taxation and regulation of foreign direct investment is often regarded as an obstacle to foreign investment as shown in this paper the total lack of inter period credibility may not necessarily prevent investments from taking place both the government and the investor can benefit from negotiating a series of short lived agreements in which the investor obtains a share of the revenue generated from previous investments against the undertaking of making new investments this assumes that intra period agreements are respected by the parties

does education increase pro environmental behavior evidence from europe abstract it is often observed that individuals with higher education levels tend to be more environmentally friendly yet the causal evidence is lacking because there may well be omitted variables that cause individuals to attain more education and also cause individuals to be environmentally conscious we implement a regression discontinuity design to estimate the increase in educational attainment due to changes in compulsory education laws in 20th century europe this allows us to overcome the identification problem of endogenous educational attainment using two waves of eurobarometer surveys we find a positive local average treatment effect for 7 of the 8 pro environmental behaviors an analysis of related questions on the survey supports the notion that education causes individuals to be more concerned with social welfare and to accordingly behave in a more environmentally friendly manner

household inventories and marketed surplus in semisubsistence agriculture a model of semisubsistence agriculture explicitly accounting for the ability of farm households to hold inventories of staple foods is developed comparative statics analysis highlights the potential importance of wealth effects attributable to price induced changes in the value of household inventories empirical results for three groups of households in an indian village confirm that failure to account for household inventories leads to an overstatement of the responsiveness of both consumption demand and marketed surplus

planning and financial literacy how do women fare many older us households have done little or no planning for retirement and there is a substantial population that seems to undersave for retirement of particular concern is the relative position of older women who are more vulnerable to old age poverty due to their longer longevity this paper uses data from a special module we devised on planning and financial literacy in the 2004 health and retirement study it shows that women display much lower levels of financial literacy than the older population as a whole in addition women who are less financially literate are also less likely to plan for retirement and be successful planners these findings have important implications for policy and for programs aimed at fostering financial security at older ages

farmers marketing preferences in local coffee markets evidence from a choice experiment in ethiopia this study investigates transactions in the local coffee markets in ethiopia while the ethiopian commodity exchange which was established in 2008 introduced regulatory institutional and organizational innovations in the coffee market informal norms and conventions remain the primary institutions governing transactions in the local markets based on a choice experiment we found that for coffee farmers the characteristics of the traders are more important than the price offered when anchoring their transactions into personal relationships this can be explained as the institutional response of farsighted calculative farmers to poorly organized coffee markets and to lacking credit and insurance markets contrary to the concept of embeddedness which claims that economic transactions are embedded into social relationships social relationships are observed to be embedded into economic relationships one of the perverse effects of these personal relationship based transactions is that farmers are insufficiently incentivized to maintain and improve coffee quality

doing well by doing good green office buildings this paper provides the first credible evidence on the economic value of the certification of green buildings in the commercial sector value derived from impersonal market transactions rather than engineering estimates we match publicly available information on the addresses of energy star and leed rated office buildings to a commercial data source detailing the characteristics of u s office buildings and their rental rates we analyze the micro data on 694 certified green buildings and on 7489 other office buildings located within a quarter mile of the certified buildings we find systematic evidence that rents for green offices are about two percent higher than rents for comparable buildings located nearby effective rents i e rents adjusted for the occupancy levels in office buildings are about six percent higher in green buildings than in comparable office buildings nearby at prevailing capitalization rates conversion of the average non green building to an equivalent green building would add more than 5 million in market value these results are robust to the statistical models employed

the profits of power land rights and agricultural investment in ghana we examine the impact of ambiguous and contested land rights on investment and productivity in agriculture in akwapim ghana we show that individuals who hold powerful positions in a local political hierarchy have more secure tenure rights and that as a consequence they invest more in land fertility and have substantially higher output the intensity of investments on different plots cultivated by a given individual corresponds to that individual s security of tenure over those specific plots and in turn to the individual s position in the political hierarchy relevant to those specific plots

peasant household behaviour with missing markets some paradoxes explained a model of peasant household behavior under varying degrees of household specific food and labor market failures is constructed to show that these structural features can explain several well known patterns of peasant response which have often been attributed to peculiar motives presumed specific to peasants the model explains sluggish response to cash crops prices and high instability in perceived food and labor scarcities the key role of manufactured consumer goods prices in stimulating peasants effort in cash crops production the effectiveness of taxation as opposed to incentives in stimulating cash crops production and the key role of technological change in food production to enhance cash crop production results are obtained analytically in the case of one market failure and by numerical simulation with more than one

subsidies and crowding out a double hurdle model of fertilizer demand in malawi this article uses a double hurdle model with panel data from malawi to investigate how fertilizer subsidies affect farmer demand for commercial fertilizer the article controls for potential endogeneity caused by the nonrandom targeting of fertilizer subsidy recipients results show that on average 1 additional kilogram of subsidized fertilizer crowds out 0 22 kg of commercial fertilizer but crowding out ranges from 0 18 among the poorest farmers to 0 30 among relatively nonpoor farmers this indicates that targeting fertilizer subsidies to the rural poor is likely to maximize the contribution of the subsidy program to total fertilizer use

transactions costs and agricultural household supply response we develop and estimate a model of supply response when transactions costs create a situation where some producers buy others sell and others do not participate in markets we present two rationales for why producing households may have different relationships to the market proportional and fixed transactions costs using data on mexican corn producers we estimate an empirical model that allows for separate tests of the significance of both types of transactions costs revealing that both fixed and proportional transactions costs matter for the estimation the results provide consistent estimates of supply elasticity and measures of the relative importance of factors determining both proportional and fixed transactions costs

the impact of farm input subsidies on maize marketing in malawi abstract this paper investigates the effects of subsidised fertilizer on marketing of maize in malawi it uses the nationally representative two wave integrated household panel survey ihps data of 2010 and 2013 the results suggest that subsidised fertilizer on average increases farmers maize market participation as sellers total quantity of maize sold and maize commercialisation in addition participation in subsidised fertilizer programme is found to increase the probability of farmers to be net sellers and increases net quantity of maize sold however the study finds no evidence of effect on net quantity of maize bought and on household maize self sufficiency these results suggest that the farm input subsidy programme has contributed toward an increased level of maize market supply engagement for small farmers and in this sense the policy has the potential to provide the wider external benefits furthermore the results have implication on the sustainability of the subsidy programme policy formulation and design of programmes for the agricultural sector and small farmers in developing countries

gender differences in risk aversion and expected retirement benefits women are generally considered more risk averse than men controlling for age income and education this study examined the impact of gender on the superannuation retirement fund risk preferences of staff in the australian university sector the findings suggest that women choose more conservative investment strategies than men and that lower income which affects the amount members contribute to their superannuation funds is the primary contributor to the lower projected retirement benefits of women providing members with a choice among risk levels in their retirement investments should significantly benefit male and female retirees

a policy utility dislocation model based on prospect theory a case study of promoting policies with low carbon lifestyle abstract a low carbon lifestyle is an inevitable choice for mitigating climate change however in the actual situation where policy makers and policy target groups are separated from each other low carbon lifestyle changes are often manifested as individual strong government actions behind which social actions are seriously lagging based on this observation in this study a concept of policy utility dislocation was developed and a policy utility dislocation model was constructed based on prospect theory numerical simulation showed that policy utility dislocation can be reduced by increasing the proportion of residents environmental benefits government efforts and subsidies and reducing the cost of implementing a low carbon lifestyle for residents in particular when the environmental benefits of the government and residents accounted for 15 and 65 respectively or the subsidy coefficient was 2 the policy utility dislocation became zero in addition policy utility dislocation began to appear when the cost of implementing a low carbon lifestyle exceeded 3 this study enriches the connotation of policy utility and quantifies the policy utility dislocation and provides new ways to launch policies that promote low carbon lifestyles

a selectivity model of household food marketing behavior in sub saharan africa the agricultural household s discrete decision of whether to participate in coarse grain markets is separated here from the continuous decision of how much to sell or buy conditional on participation failure to participate in markets results from high fixed transactions costs a selectivity model endogenously switches households into alternative market participation states correcting for bias caused by the exclusion of unobservable variables affecting both discrete and continuous decisions improved market information increases the probability of participation by sellers while access to cereals processing technology increases quantities transacted by both sellers and buyers conditional on participation

smallholder market participation under transactions costs maize supply and fertilizer demand in kenya abstract this paper assessed the effects of transactions costs relative to price and non price factors on smallholder marketed surplus and input use in kenya a selectivity model was used that accounts for the effects of transactions costs assets technology and support services in promoting input use and generating a marketable surplus output supply and input demand responses to changes in transactions costs and price and non price factors were estimated and decomposed into market entry and intensity the results showed that while transactions costs indeed have significant negative effects on market participation institutional innovations such as group marketing are also emerging to mitigate the costs of accessing markets output price has no effect on output market entry and only provides incentives for increased supply by sellers on the other hand both price and non price factors have significant influence on adoption and intensity of input use overall the findings suggest that policy options are available other than price policies to promote input use and marketed surplus the paper concludes with implications for policy to induce greater input output market participation among smallholders in africa

ownership of stocks and mutual funds a panel data analysis this paper analyzes the ownership dynamics of stocks and mutual funds using representative household panel data the dutch center savings survey 1993 1998 a bivariate dynamic binary choice model is introduced allowing for interactions between the two types of assets we find that unobserved heterogeneity and state dependence play a large role for both types of assets the positive relation between ownership of one type in one period and the other type in the next period is explained by correlated unobserved heterogeneity a negative state dependence effect of lagged ownership of stocks on ownership of mutual funds is found which can be explained by the costs of shifting funds across the two forms of stockholding

the corporate social performance financial performance link strategic managers are consistently faced with the decision of how to allocate scarce corporate resources in an environment that is placing more and more pressures on them recent scholarship in strategic management suggests that many of these pressures come directly from sources associated with social issues in management rather than traditional arenas of strategic management using a greatly improved source of data on corporate social performance this paper reports the results of a rigorous study of the empirical linkages between financial and social performance corporate social performance csp is found to be positively associated with prior financial performance supporting the theory that slack resource availability and csp are positively related csp is also found to be positively associated with future financial performance supporting the theory that good management and csp are positively related 1997 by john wiley sons ltd