access to markets and rural poverty evidence from household consumption in china abstract this paper presents evidence on the effects of access to domestic and international markets on per capita consumption of households using data from rural china the econometric analysis uses alternative identification schemes to address the potential endogeneity of access to markets we use straight line distances to coastline and navigable river along with the topography of the intervening counties as sources of exogeneous variations we also use identification through heteroskedasticity which does not rely on standard exclusion restrictions the results from alternative identification schemes show that better access to both domestic and international markets has positive effects on per capita consumption the domestic market effect is significantly larger in magnitude and there is complementarity between the access to domestic and international markets

option value empirical evidence from a case study of recreation and water quality a procedure for measuring option value and other preservation values of water quality is developed and applied to a case study area in the south platte river basin colorado benefits from water based recreation activities are the focus of the study the results provide an empirical test and confirmation of weisbrod s proposal that option value and other preservation values represent important social benefits and should be added to the aggregate consumer surplus of recreation activities to determine the total benefit of environmental amenities to society in the absence of such an estimate insufficient resources would be allocated by society to preservation of unique environments such as pristine mountain streams where mineral and energy development may irreversibly degrade water quality

politics growth and inequality in rural china does it pay to join the party abstract economic reform is often constrained because rank and file bureaucrats responsible for implementation have vested interests that oppose change drawing on an unusual longitudinal survey data set for a representative rural county in northern china we show an alternative positive scenario consistent with the presence of an implicit performance based incentive contract that ties the household incomes of local officials to market liberalization increases in consumer demand and the provision of local public goods the mechanisms appear to be tolerated as the fruits of growth are shared fairly equitably thus allowing implementation of a politically and economically self reinforcing reform process

learning about a new technology pineapple in ghana this paper investigates the role of social learning in the diffusion of a new agri cultural technology in ghana we use unique data on farmers communication patterns to define each individual s information neighborhood conditional on many potentially confounding variables we find evidence that farmers adjust their inputs to align with those of their information neighbors who were surpris ingly successful in previous periods the relationship of these input adjustments to experience further indicates the presence of social learning in addition applying the same method to input choices for another crop of known technol ogy correctly indicates an absence of social learning effects jel d83 013 033 q16

evidence on growth increasing returns and the extent of the market if economic growth relies upon the extent of the market then openness will decrease the connection between initial income and later growth alternatively learning by doing models suggest that wealth will be more positively correlated with growth in open economies because trade causes advanced economies to specialize in products with more opportunities for learning we examine twentieth century less developed countries and nineteenth century u s states in both data sets there is a much stronger correlation between growth and initial wealth among closed economies these findings support the importance of the extent of the market and aggregate demand in fostering growth

the road to growth measuring the tradeoffs between economic growth and ecological destruction summary roads bring significant economic benefits that are vital for development but they are often also the precursors to deforestation and other adverse environmental impacts this paper examines the road induced tradeoffs between economic growth deforestation and biodiversity loss in the democratic republic of congo drc decades of conflict have left the drc s transport infrastructure among the sparsest and most dilapidated in the world most of the provincial capitals are unconnected to the capital city and improving road connectivity could lead to a significant boost in trade and economic growth at the same time the drc is also home to the second largest rainforest in the world the iconic congo forests are a trove of ecological value some monetizable and most that is not so the destruction of the drc s forests will have significant environmental ramifications we provide empirical estimates of the economic benefits of improving market access and reducing transportation costs we then estimate a forest destruction function to assess the impact that new or improved roads have on forest clearing in addition a novel biodiversity index is developed to identify forests of high biodiversity significance two simulations are performed to quantitatively demonstrate the impacts of road improvement projects in terms of increased gdp forest loss and biodiversity that are put at risk to our knowledge this is the first study to jointly examine the economic benefits and ecological risks to infrastructure investments it is envisioned that the methods employed here can be used to guide future infrastructure investments toward designs which have a large economic impact while minimizing ecological risks

how endowments accumulations and choice determine the geography of agricultural productivity in ecuador spatial disparity in incomes and productivity is apparent across and within countries most studies of the determinants of such differences focus on cross country comparisons or location choice among firms less studied are the large differences in agricultural productivity within countries related to concentrations of rural poverty for policy understanding the determinants of this geography of agricultural productivity is important because strategies to reduce poverty often feature components designed to boost regional agricultural incomes census and endowment data for ecuador are used to estimate a model of endogenous technology choice to explain large regional differences in agricultural output and factor productivity a composite error estimation technique is used to separate systemic determinants from idiosyncratic differences simulations are employed to explore policy avenues the findings suggest a differentiation between the types of policies that promote growth in agriculture generally and those that are more likely to assist the rural poor

estimating the public good value of preserving a local historic landmark the role of non substitutability and citizen information this study applies stated preference methods to estimate the public good values of preservation and restoration of a local historic landmark in a medium sized us city the survey device centres on

on the asymmetry of the vagueness band in willingness to pay answers the noaa panel for contingent valuation opened up the question of the possibility of using trichotomous choice discrete formats in cv studies in this paper we show how the trichotomous choice format can be used for testing the successfulness of the project definition in the questionnaire we shall define the vagueness band around the true outcome of the project to be valued and we allow it to be asymmetric it is shown how this asymmetry can be modelled and estimated we also show how these new models are generalisations of ordinary ordered probit logit models

the effect of distance and road quality on food collection marketing margins and traders wages evidence from the former zaire abstract food price variation is typical of the food economies of many low income countries the presence or absence of road infrastructure is perceived to be one of the main determinants of this variation this analysis shows that in the case of the former zaire food price dispersion is significant both across products and across regions it is demonstrated that transportation costs explain most of the differences in food prices between producer regions and that road quality is an important factor in the transportation costs however food prices decrease relatively faster than transportation costs increase and traders wages are higher on bad roads

the effects of tax policy on aggregate agricultural investment the effects of tax policies on aggregate agricultural investment are examined results from this analysis suggest that tax policies are effective in promoting agricultural investment nearly 20 percent of net investment in agricultural equipment during the period 1956 through 1978 is attributed to tax policy from 1956 to 1978 tax policy has stimulated in real dollars over 5 billion in net investment in equipment and in excess of 1 billion in structures

are chinese cities too small this paper models and estimates net urban agglomeration economies for cities economic models of cities postulate an inverted u shape of real income per worker against city employment where the inverted u shifts with industrial composition across the urban hierarchy of cities this relationship has never been estimated in part because of data requirements china has the necessary data and context we find that urban agglomeration benefits are high real incomes per worker rise sharply with increases in city size from a low level they level out nearer the peak and then decline very slowly past the peak we find that a large fraction of cities in china are undersized due to nationally imposed strong migration restrictions resulting in large income losses

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

participatory environmental education and willingness to pay for river basin management empirical evidence from nigeria this paper examines the role of participation as a tool for improving individuals perceptions and environmental values using a test retest experiment conducted in south eastern nigeria two identical contingent valuation experiments were interspersed by participatory workshops designed to involve respondents in framing and forming the valuation scenario econometric analyses found that participatory education significantly developed individuals perceptions of pollution problems and increased the magnitude and precision of their wtp for a river basin management scheme the extent of changes in perceptions declined with increasing levels of formal education suggesting that less educated respondents are more likely to hold weakly formed preferences

do reminders of substitutes and budget constraints influence contingent valuation estimates a test is performed of the recommendation by the noaa panel on contingent valuation that respondents be reminded about other substitute resources and their budget constraint prior to answering the willingness to pay wtp question the context for this experiment is a cvm study of the benefits from reducing fire hazards to old growth forests in oregon the test was performed using two mail surveys that were otherwise identical except for the inclusion of reminder statements prior to the wtp question the dichotomous choice logit equations were not statistically different between versions and the mean wtp results were identical

sales location among semi subsistence cassava farmers in benin a heteroskedastic double selection model in much of rural africa high transaction costs limit farmers market participation and thus their potential for income growth transaction costs can affect not only whether a farmer sells product but also whether sales occur at the farm gate or at a market if production behavior is related to a chosen sales location then analysis of interventions can be improved by explicit consideration of the decision of where to sell this article develops a double selection model that explains consumption and production decisions by semi subsistence farmers who first decide whether to be a seller and then whether to sell at the farm gate or at an off farm location before deciding on production and consumption the study tests the validity of this dual criteria model against a single criterion model in which a grower first decides to be a seller and then decides production consumption and sales location simultaneously the results suggest that the dual criteria model provides more information than the single criterion model using a sample of cassava producer in benin

china s uneven progress against poverty while the incidence of extreme poverty in china fell dramatically over 1980 2001 progress was uneven over time and across provinces rural areas accounted for the bulk of the gains to the poor though migration to urban areas helped the pattern of growth mattered rural economic growth was far more important to national poverty reduction than urban economic growth agriculture played a far more important role than the secondary or tertiary sources of gross domestic product gdp rising inequality within the rural sector greatly slowed poverty reduction provinces starting with relatively high inequality saw slower progress against poverty due both to lower growth and a lower growth elasticity of poverty reduction taxation of farmers and inflation hurt the poor external trade had little short term impact

aggregate agricultural supply response in developing countries a survey of selected issues the authors review several studies of the aggregate agricultural supply response using both economic and econometric reasons they argue that time series estimation typically generates a downward biased estimate of the response to a credible reform even though time series estimates can provide an accurate picture of past behavoiral relations they do not provide an adequate basis for forecasting the impact of policy reform this is especially true in developing countries where policy reforms involve large changes and have included agricultural price reform industrial trade liberalization financial sector reform and macroeconomic stabilization under those circumstances parameters values obtained under the former policy regime have little relevance in the new regime the authors also argue that investment in public goods should be viewed as complementary to not competitive with price policy they claim that to select the policy with the biggest impact on output makes no sense they provide what they consider to be better criteria for choosing the best from alternative policies

adoption of agricultural innovations in developing countries a survey this paper reviews various studies which have provided a description and possible explanation to patterns of innovation adoption in the agricultural sector the survey points out that the tendency of many studies to consider innovation adoption in dichotomous terms adoption nonadoption may not be appropriate in many cases where the actual decisions are defined over a more continuous range more attention needs to be given to the socio cultural and institutional environment in area studies so that their interrelation with economic factors affecting adoption can be inferred the presence of several interrelated innovations is another aspect that needs to be considered more carefully in future research since a number of simultaneous decisions may be involved furthermore the possibility of regular sequential patterns in adopting components of a new technological package should be specifically addressed in future studies finally the impact of differential adoption rates on land holding distribution merits attention in future research

on measuring the benefits of lower transport costs despite large amounts invested in rural roads in developing countries little is known about their benefits this paper derives an expression for the willingness to pay for a reduction in transport costs from the canonical agricultural household model and uses it to estimate the benefits of a hypothetical road project estimation is based on novel cross sectional data collected in a small region of madagascar with enormous yet plausibly exogenous variation in transport cost a road that essentially eliminated transport costs in the study area would boost the incomes of the remotest households those facing transport costs of about usd 75 ton by nearly half mostly by raising non farm earnings this benefit estimate is contrasted to one based on a hedonic approach

housing choice hindrances and urban spatial structure evidence from matched location and location preference data in chinese cities abstract in a monocentric city with a well functioning residential market pareto efficient spatial equilibrium entails the sorting of residents according to their bid rent gradient in descending order away from city center violation of this sorting condition creates opportunities for pareto improving trading of locations and can be sustained only if the market is hindered we propose a simple ordered location choice model using matched location and location preference data of individual households to examine violations of the pareto efficient spatial sorting condition in so doing we are able to identify population groups facing housing choice hindrances we find in a sample of chinese cities undergoing housing market liberalization that poor marketability of the previously state provided homes inadequate provision of housing finance and spatial mismatch between job market and housing market opportunities contribute to a pareto inefficient spatial structure

the evolution of income inequality in rural china abstract in this article we analyze trends in income inequality and the distribution of income in rural china from 1987 to 1999 we find an uneven but long run increase in inequality in rural china and show that nearly half of the rural population was not much better off in 1999 than at the start of the period we rule out geography as the most important factor for explaining income differences and the increases that occurred over time much more important were growing differences between households living in the same village province or region we also find that access to nonagricultural incomes from local wage employment and family businesses contributes to inequality but that employment outside the county in which a household lives and accessed through temporary migration is relatively equalizing finally we document important strengths and weaknesses of the primary data set used for our analyses relative to other data sources available for study of inequality and poverty in rural china

agricultural technology choice and transport this paper addresses an old and recurring theme in development economics the slow adoption of new technologies by farmers in many developing countries the paper explores a somewhat novel link to explain this puzzle the link between market access and the incentives to adopt a new technology when there are non convexities the paper develops a theoretical model to guide the empirical analysis which uses spatially disaggregated agricultural production data from spatial production allocation model and living standards measurement study survey data for nigeria the model is used to estimate the impact of transport costs on crop production the adoption of modern technologies and the differential impact on returns of modern versus traditional farmers to overcome the limitation of data availability on travel costs for much of africa road survey data are combined with geographic information road network data to generate the most thorough and accurate road network available with these data and the highway development management model minimum travel costs from each location to the market are computed consistent with the theory analysis finds that transportation costs are critical in determining technology choices with a greater responsiveness among farmers who adopt modern technologies and at times a perverse negative response to lower transport costs among those who employ more traditional techniques in sum the paper presents compelling evidence that the constraints to the adoption of modern technologies and access to markets are interconnected and so should be targeted jointly

the impacts of tax reform on agricultural households estimates of tax reform s impacts usually concentrate on macroeconomic impacts but attention at the industry or sectoral level is often limited our study uses a computable general equilibrium cge model to estimate the disaggregated impacts of the tax cuts and jobs act tcja of 2018 which lowered personal and corporate tax rates focusing on agriculture we use survey data to calculate how the tcja would change the tax rates faced by farmers at the sector level we use internal revenue service data to calculate tax rates for all other producers we then simulate the economy wide and sectoral effects of tcja we find that the tcja would cause a reduction in agricultural output as resources would be reallocated to other sectors using our survey data we extend the cge results to measure the impacts to farm households from changes in on and off farm income we find that most farm households would have income gains from tax reform our tax reform scenario highlights the fact that investment weighs heavily on model results that is firms that are attractive to domestic and foreign investment have gains in demand for their products while other sectors such as primary agriculture experience decreases in production a sensitivity analysis that reduces the attractiveness of the united states in foreign investment shows smaller impacts of tcja especially for macroeconomic variables

how migration restrictions limit agglomeration and productivity in china china strongly restricts rural urban migration resulting in a well acknowledged surplus of labor in agriculture but migration is also restricted within sectors this paper argues that these intra sector restrictions lead to insufficient agglomeration of economic activity in both the rural industrial and urban sectors with resulting first order losses in gdp for urban areas the paper estimates a city productivity relationship based on city gdp numbers the effects of access educational attainment fdi and public infrastructure on productivity are estimated given these worker productivity is shown to be an inverted u shape function of city employment with the peak point shifting out as industrial composition moves from manufacturing to services as predicted by urban theory as far as we know this is the first paper to actually estimate the relationship between output per worker and city scale for any country the majority of chinese cities are shown to be potentially undersized below the lower bound on the 95 confidence interval about the size where their output per worker peaks the paper calculates the large gains from increased agglomeration in both the rural industrial and urban sectors

the role of uncertainty in the relationship between fairness evaluations and willingness to pay participants in contingent valuation studies may be uncertain about a number of aspects of the policy and survey context the uncertainty management model of fairness judgments states that individuals will evaluate a policy in terms of its fairness when they do not know whether they can trust the relevant managing authority or experience uncertainty due to insufficient knowledge of the general issues surrounding the environmental policy similarly some researchers have suggested that not knowing how to answer wtp questions participants convey their general attitudes toward the public good rather than report well defined economic preferences these contentions were investigated in a sample of 840 residents in four urban catchments across australia who were interviewed about their wtp for stormwater pollution abatement four sources of uncertainty were measured amount of prior issue related thought trustworthiness of the water authority insufficient scenario information and wtp response uncertainty a logistic regression model was estimated in each subsample to test the main effects of the uncertainty sources on wtp as well as their interaction with fairness and proenvironmental attitudes results indicated support for the uncertainty management model in only one of the four samples similarly proenvironmental attitudes interacted rarely with uncertainty to a significant level and in ways that were more complex than hypothesised it was concluded that uncertain individuals were generally not more likely than other participants to draw on either fairness evaluations or proenvironmental attitudes when making decisions about paying for stormwater pollution abatement

animal health inputs endogenous risk general infrastructure technology adoption and industrialized animal agriculture abstract this paper develops a microeconomic model of concentrated animal feeding operations that admits roles for all of animal health inputs genetic profile choices and the pertaining economic infrastructure the basic model emphasizes how time on feed feed density and biosecurity choices interact as well as how these choices respond to i input prices and ii attributes regarding animal productivity parameters that might be influenced by policy choices such as animal welfare strictures and restraints on use of medication we show that ostensibly substituting inputs in protecting against animal health risks may in fact be complements and that the model s production choices come as a complementary package we then extend the model to endogenize the choice of animal genetics a finding is that innovations in general infrastructure encourage herd owners to choose more feed efficient but less hardy animals higher feed conversion efficiency then induces the use of denser feed rations accelerated finishing and greater levels of biosecurity actions at farm perimeters our theory provides a coherent framework for explaining associations among inputs and outcomes that are linked with confined animal agriculture it also explains how animal protein supply chain technology adoption and performance can differ according to a region s state of infrastructure why responses to a change in infrastructure may be large and why public sector efforts to reduce production risk may beget private sector effort to do so

regional decentralization and fiscal incentives federalism chinese style abstract aligning the interests of local governments with market development is an important issue for developing and transition economies using a panel data set from china we investigate the relationship between provincial government s fiscal incentives and provincial market development we report three empirical findings first we find that during the period of fiscal contracting system the discrepancy between ex ante contracts and ex post implementation was relatively small suggesting that the fiscal contracts were credible second we find a much higher correlation about four times between the provincial government s budgetary revenue and its expenditure during 1980s and 1990s as compared to 1970s demonstrating that provincial governments faced much stronger ex post fiscal incentives after reform third we find that stronger ex ante fiscal incentives measured by the contractual marginal retention rate of the provincial government in its budgetary revenue are associated with faster development of the non state sector as well as more reforms in the state sector in the provincial economy this holds even when we control for the conventional measure of fiscal decentralization finally we compare federalism chinese style to federalism russian style

microfinance and moneylender interest rate evidence from bangladesh summary the linkage between the formal and informal credit markets in developing countries has largely been unexplored this paper addresses one important aspect of the linkage by empirically investigating the impact of the intervention of microfinance programs on the moneylender interest rates in northern bangladesh and finds that moneylender interest rates increase with microfinance program coverage higher microfinance program coverage increases moneylender interest rates in the villages in which more loans are invested in productive economic activities than consumption borrowers resort to moneylenders for additional funds probably because of inadequate supply unavailability of seasonal working capital from mfis and tight repayment schedules which in turn increase demand for moneylender loans

learning by doing and learning from others human capital and technical change in agriculture household level panel data from a nationally representative sample of rural indian households describing the adoption and profitability of high yielding seed varieties hyvs associated with the green revolution are used to test the implications of a model incorporating learning by doing and learning spillovers the estimates indicate that i imperfect knowledge about the management of the new seeds was a significant barrier to adoption ii this barrier diminished as farmer experience with the new technologies increased iii own experience and neighbors experience with hyvs significantly increased hyv profitability and iv farmers do not fully incorporate the village returns to learning in making adoption decisions

modeling technology adoption in developing countries an analysis of technology adoption decisions by poor farmers is provided some possible empirical models for studying technology adoption are reviewed the issue of theoretical consistency is dealt with in terms of the costs of such consistency measured in data needs and model complexity and the benefits measured in terms of understanding the micro economic foundations of adoption

temporal and spatial modelling of tropical deforestation a survival analysis linking satellite and household survey data we estimate a spatially explicit model of the forest clearance process among smallholder farmers in an agricultural frontier of southern mexico our analysis takes as its point of departure a simple utility maximising model that suggests many possible determinants of deforestation in an economic environment characterised by missing or thin markets hypotheses from the model are tested on a data set that combines a time series of satellite imagery with data collected from a survey of farm households whose agricultural plots were geo referenced using a global positioning system gps we implement a survival analysis to identify the effect of household level explanatory variables on the probability of deforestation this approach allows us to introduce a measure of the time until clearance as a covariate thereby affording a control for the effect of potentially important explanatory variables that vary through time but are not directly observable in addition to identifying several variables relevant for policy analysis including household demographics proximity to roads and government provision of agricultural support model results suggest that the deforestation process is characterised by non linear duration dependence with the probability of forest clearance first decreasing and then increasing with the passage of time

fertilizer use risk and off farm labor markets in the semi arid tropics of india a two period model is developed in which a risk averse farmer uses off farm labor to smooth consumption leading to greater use of fertilizer fertilizer demand is shown to increase with the depth of the off farm labor market controlling for exogenous weather risk farmers use more fertilizer the lower the unemployment rate and the higher the share of nonagricultural work in total off farm labor the results suggest that off farm labor markets and own farm production may be complementary in risky production environments so that policies which promote the depth of the off farm labor market in low income areas may also bolster farm productivity copyright 2003 oxford university press

the importance of regret minimization in the choice for renewable energy programmes evidence from a discrete choice experiment abstract this study provides a methodologically rigorous attempt to disentangle the impact of various factors unobserved heterogeneity information and environmental attitudes on the inclination of individuals to exhibit either a utility maximization or a regret minimization behaviour in a discrete choice experiment for renewable energy programmes described by four attributes greenhouse gas emissions power outages employment in the energy sector and electricity bill we explore the ability of different models multinomial logit random parameters logit and hybrid latent class and of different choice paradigms utility maximization and regret minimization in explaining people s choices for renewable energy programmes the pure random regret random parameters logit model explains the choices of our respondents better than other models indicating that regret is an important choice paradigm and that choices for renewable energy programmes are mostly driven by regret rather than by rejoice in particular we find that our respondents choices are driven more by changes in greenhouse gas emissions than by reductions in power outages finally we find that changing the level of information to one attribute has no effect on choices and that being a member of an environmental organization makes a respondent more likely to be associated with the utility maximization choice framework

distributional effects of corruption when enforcement is biased theory and evidence from bribery in schools in bangladesh in many models of corruption where enforcement is unbiased and the official maximizes her income the rich are more likely to pay bribes for their children s education implying that corruption reduces educational inequality we develop models of bribery that reflect the fact that in developing countries anti corruption enforcement is not unbiased and higher income of a household is associated with higher bargaining power and better quality of institutions in models of biased enforcement the rich are less likely to pay bribes making bribery regressive the ols estimates of the effects of household income are likely to find spurious progressivity in the incidence of bribery in schools we exploit temporary rainfall shocks to identify the ability to pay effect while long term rainfall differences identify the combined poor people and poor area effects the iv estimates show that the poor are more likely to pay bribes and the amount paid does not depend on household income the evidence rejects the ability to pay and related models based on unbiased enforcement and is consistent with the refusal to pay model of bargaining power where the rich decline to pay bribes free schooling is free only for the rich and corruption makes the playing field skewed against the poor

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

an ordered tobit model of market participation evidence from kenya and ethiopia do rural households in developing countries make market participation and volume decisions simultaneously or sequentially this article develops a two stage econometric method to test between these two competing hypotheses regarding household level marketing behavior the first stage models the household s choice of whether to be a net buyer autarkic or a net seller in the market the second stage models the quantity bought sold for net buyers sellers based on observable household characteristics using household data from kenyan and ethiopian livestock markets we find evidence in favor of sequential decision making the welfare implications of which we discuss

income distribution in urban china during the period of economic reform and globalization this paper addresses three issues that are central to understanding the effects of the transition in china from central planning to a more market oriented economic system first what have been the consequences of the economic reforms for the distribution of income in urban areas second what has happened to the incidence of urban poverty third have government policies helped to diminish or accentuate urban poverty and inequality answers to these questions are based on a comparison of two national sample surveys conducted in 1988 and 1995

the extent of the market and stages of agricultural specialization this paper provides empirical evidence of nonlinearity in the relationship between crop specialization in a village economy and the extent of the market size of the urban market relevant for the village the results suggest that the portfolio of crops in a village economy becomes more diversified initially as the extent of the market increases however after the market size reaches a threshold the production structure becomes specialized again this evidence on the stages of agricultural diversification is consistent with the stages of diversification identified in the recent literature for the economy as a whole and also for the manufacturing sector the evidence highlights the importance of improving farmers access to markets through investment in transport infrastructure and removal of barriers to trading

implications of non farm work to vulnerability to food poverty recent evidence from northern ghana summary using survey data from northern ghana this study seeks to establish the impact of participation in non farm work on the vulnerability of resource poor households to food poverty vulnerability to food poverty is assessed based on expected future food expenditure of households the potential endogeneity problem associated with participation in non farm work by households is overcome using a novel instrumental variable approach analysis of the determinants of expected future food expenditure is done using a standard feasible generalized least squares fgls method demographic and socioeconomic variables location variables and household facilities are included in the model as control variables our study finds that participation in non farm work significantly increased the future expected food consumption thereby alleviating the vulnerability of households to food poverty our study also confirms that current food poverty and future food poverty i e vulnerability to food poverty are not independent from each other non farm work plays a crucial role in providing the means to overcome the risk of food poverty in these resource poor households policies that promote off farm income generating activities such as small businesses and self employment as well as the creation and support of businesses that absorb extra labor from the farm should be encouraged in the study region because households in the study region are exposed to above average levels of hunger and food poverty the study recommends the government of ghana and development partners to take measures that enhance the resilience of these resource poor households

is public expenditure productive abstract this paper considers the relationship between aggregate productivity and stock and flow government spending variables the empirical results indicate that i the nonmilitary public capital stock is dramatically more important in determining productivity than is either the flow of nonmilitary or military spending ii military capital bears little relation to productivity and iii a core infrastructure of streets highways airports mass transit sewers water systems etc has most explanatory power for productivity the paper also suggests an important role for the net public capital stock in the productivity slowdown of the last fifteen years

testing asset fixity for u s agriculture two problems which have concerned agricultural economists since the great depression are low farm resource returns and agriculture s tendency to maintain high aggregate production in the face of declining real product prices the latter phenomenon referred to as irreversibility of supply has spawned a significant literature on approaches to estimating and testing irreversible supply curves houck tweeten and quance while there are numerous explanations of these problems it is widely accepted that both are at least partially due to some asset fixity within agriculture that is in the aggregate there are certain productive factors which are trapped in agriculture attempts to explain asset fixity are not new galbraith and black early argued that high fixed costs contribute to a lumpiness of important factors which makes their temporary reduction or reorganization so expensive as to be unprofitable in the short run later g l johnson hypothesized that productive assets are trapped in agriculture because of a divergence between acquisition costs and salvage value formal developments are in edwards hathaway and johnson and quance both explanations have been challenged d g johnson concluded that available empirical evidence did not support galbraith and black s high fixed cost hypothesis he argued instead that the data were consistent with inelastic supply of agricultural inputs johnson and pasour criticized inferring asset fixity from a divergence between acquisition costs and salvage values they argued that the appropriate concept for investigating resource allocation is that of the resource s opportunity cost although they criticized g l johnson s fixed asset theory they still concluded that asset fixity theory can contribute toward an understanding of why the supply function whether firm or industry is not reversible

nudging acceptability for wood ash recycling in forests a choice experiment abstract in this paper our objective is to assess the general french population s acceptability of application of wood ash in forests a measure currently not allowed but under consideration by the government the main originality of our approach is that we test how a nudge can be used as an instrument to increase social acceptability conveying objective information regarding ash recycling furthermore although we do not consider it as a welfare measure we show how the estimation of the willingness to pay can be considered as a complement to the more traditional social acceptability measure three nudges were introduced as three treatments in a discrete choice experiment in the first treatment the options with wood ash application were highlighted to indicate to the respondents that they corresponded to pro environmental measures positive framing in the second treatment we changed the wording of the two non status quo options to highlight the recycling aspect of wood ash application in the last treatment we adopted a productive wording to highlight the fact that wood ash application increases wood production treatments in particular positive framing and productive wording influence the willingness to pay but depend on the attitudes of the respondents

adjustment costs and dynamic factor demands for u s cigarette manufacturing abstract following the approach of berndt fuss and waverman a dynamic model for u s cigarette manufacturing is developed and factor demands estimated tobacco and capital stocks are treated as quasi fixed inputs the results indicate that there are significant adjustment costs associated with adjusting tobacco stocks but not with adjusting the capital stock short run intermediate run and long run output constant elasticities are estimated for inputs in cigarette production demand for u s tobacco by u s cigarette manufacturers is found be more inelastic than shown by previous studies using static models cigarettes produced for export appear to differ in their marginal cost of production from cigarettes produced for the sale in the u s market

option price estimates for water quality improvements a contingent valuation study for the monongahela river abstract we present the findings from a contingent valuation survey designed to estimate the option price bids for the improved recreation resulting from enhanced water quality in the pennsylvania portion of the monongahela river the findings are based on a survey design that used professional interviewers to conduct personal interviews determined from a representative sample of 393 households in addition the research suggests that protest bids and outliers be viewed similarly accordingly a new technique for identifying outlying responses is proposed the findings suggest that the question format affects the option price estimates and that criteria for determining the final sample of responses can have an important influence on contingent valuation results

the effects of tax policy on investment in agriculture the effects of tax policy on agricultural investment are investigated by estimating a dynamic interrelated input demand system net investment is specified to give rise to increasing internal costs of adjustment resulting in capital inputs being quasi fixed the system of demand equations is derived by incorporating a quadratic normalized restricted cost function into a long run dynamic optimization framework copyright 1991 by mit press

geographic poverty traps a micro model of consumption growth in rural china how important are neighbourhood endowments of physical and human capital in explaining diverging fortunes over time for otherwise identical households in a developing rural economy to answer this question we develop an estimable micro model of consumption growth allowing for constraints on factor mobility and externalities whereby geographic capital can influence the productivity of a household s own capital our statistical test has considerable power in detecting geographic effects given that we control for latent heterogeneity in measured consumption growth rates at the micro level we find robust evidence of geographic poverty traps in farm household panel data from post reform rural china our results strengthen the equity and efficiency case for public investment in lagging poor areas in this setting copyright 2002 john wiley sons ltd

dynamic input demand an application to agriculture a theoretically consistent analytical framework for examining dynamic agricultural input demand is developed and applied results from duality theory on restricted variable profit functions are incorporated into a long run dynamic optimization framework input use is affected by external adjustment costs which permits sluggish factor adjustment

commodity specification and the framing of contingent valuation questions contingent valuation studies comprise a process of information transfer a researcher through a survey instrument conveys information about the item being valued and repondents in turn provide information about the value they place on this item considering contingent valuation from this perspective nearly all of the research evaluating the validity of this valuation method is in a general sense focused on examining the effects of information structures on value estimates a comparison of various questioning techniques represents such an examination boyle and bishop 1988 randall hoehn and tolley 1981 smith desvousges and fisher 1986 on a more specific level the selection of a payment vehicle also forms part of the information set and may affect statements of value greenley walsh and young 1982 1985 mitchell and carson 1985 these examples suggest that the validity of estimated contingent values relies heavily on the information conveyed to survey respondents since varying information structures can affect the magnitude of estimated values

effects of different descriptions of the ecological good on willingness to pay values abstract the contingent valuation cv method is a survey based method that is used to put a price on ecological goods due to its hypothetical character the validity of the cv method forms part of an ongoing debate this article deals with one aspect of this validity viz the proper description of the ecological good of interest the question is whether and if so to what extent different descriptions meant as representations of the same good influence respondents willingness to pay wtp do different descriptions of the ecological good result in the same representation of that good or will these descriptions result in different images of the good and consequently in different values if the latter occurs a validity problem arises a field experiment was conducted to study the effects of three descriptions of the good a clean environment around the year 2015 the results of this experiment show that rather large differences in the description of this good have a significant effect on wtp values as well as on the number of protest bidders smaller differences in the description however do not show such an effect it seems as if certain information thresholds have to be overcome in order to affect wtp values

households willingness to pay for reliable electricity services in ghana abstract access to reliable electricity is important in increasing the living standards of households and promoting sustainable development however ghanaian households have had to grapple with frequent power outages and poor quality electricity services in recent times this study examines the factors influencing households willingness to pay for reliable electricity services in ghana using data collected from 950 households in the cape coast metropolitan area and the tobit regression technique it was revealed that monthly income prior notice on power outages business ownership separate meter ownership household size and education significantly affect willingness to pay for reliable electricity services on the average households were prepared to pay 44 percent gh 6 80 us 3 42 more relative to the mean monthly electricity bill in the sample to improve electricity services it is envisaged that the findings would be used by policy makers and utility companies to make electricity generation and distribution more sustainable and efficient

the price effect of tariff liberalization measuring the impact on household welfare abstract trade policy literature has for many years emphasized open policies positive impact on economic growth and development while these results generally hold when measured on averages empirical evidence suggests that trade liberalization is unlikely to produce beneficial results across all households this study adds to the literature by providing an analysis of the distributive effects of tariff liberalization in mexico the paper examines the effect of tariff liberalization from the perspective of households both as consumers and factor owners allowing for imperfect domestic price transmission the results indicate the overall positive effect of tariff liberalization masks significant differences in the distribution of gains both across income levels and across geographic regions richer households are found to have gained relatively more urban areas as well as mexican states closest to the united states border are also found to be larger beneficiaries while southernmost states have been largely bypassed by the effects of tariff liberalization those results can be explained not only in relation to the different endowments of the households but also by the diverse effects on local prices that has resulted from mexican trade liberalization

the complex dynamics of smallholder technology adoption the case of sri in madagascar this article explores the dynamics of smallholder technology adoption with particular reference to a high yielding low external input rice production method in madagascar we present a simple model of technology adoption by farm households in an environment of incomplete financial and land markets we then use a probit model and symmetrically censored least squares estimation of a dynamic tobit model to analyze the decisions to adopt expand and disadopt the method we find that seasonal liquidity constraints discourage adoption by poorer farmers learning effects both from extension agents and from other farmers exert significant influence over adoption decisions

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

are there environmental limits to cost benefit analysis this paper considers the problem areas found in applying cost benefit analysis cba to projects involving environmental costs or benefits this is particularly relevant given recent moves by the uk government to include environmental valuations in cba exercises and in other related appraisal activities following the publication of the pearce report the paper argues that a major problem lies in placing monetary values on non market goods the paper also addresses the problems of i differences between citizen and consumer values ii complexity of ecosystems iii irreversibility and uniqueness and iv intergenerational equity and discounting the extent to which cba is an institution open to capture is also discussed

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 numerical simulation analysis of hukou labour mobility restrictions in china abstract we use numerical simulation methods to analyze the hukou system of permanent registration in china which many believe has supported growing relative inequality over the last 20 years by restraining labour migration both between the countryside and urban areas and between regions and cities our aim is to inject economic modelling into the debate on sources of inequality in china which thus far has been largely statistical we first use a model with homogeneous labour in which wage inequality across various geographical divides in china is supported solely by quantity based migration restrictions urban rural areas rich poor regions eastern central and western non coastal zones eastern and central western development zones eastern central western zones more disaggregated 6 regional classifications and an all 31 provincial classification we calibrate this model to base case data and when we remove migration restrictions all wage and most income inequality disappears results from this model structure points to a significant role for hukou restrictions in supporting inequality in china we then present a further model extension in which urban house price rises retard rural urban migration the impacts of removing hukou restrictions on migration are smaller but are still significant finally we modify the model to capture labour productivity differences across regions calibrating the modified model to estimates of both national and regional gini coefficients removal of migration barriers is again inequality improving but less so

consumption risk technology adoption and poverty traps evidence from ethiopia much has been written on the determinants of input and technology adoption in agriculture with issues such as input availability knowledge and education risk preferences profitability and credit constraints receiving much attention this paper focuses on a factor that has been less well documented the differential ability of households to take on risky production technologies for fear of the welfare consequences if shocks result in poor harvests building on an explicit model this is explored in panel data for ethiopia historical rainfall distributions are used to identify the counterfactual consumption risk controlling for unobserved household and time varying village characteristics it emerges that not just ex ante credit constraints but also the possibly low consumption outcomes when harvests fail discourage the application of fertilizer the lack of insurance causes inefficiency in production choices