why do suppliers charge larger buyers lower prices the phenomenon of input suppliers charging larger buyer firms relative to smaller buyer firms lower prices is commonly explained in terms of supplier economies of scale supplier competition for larger buyers and the larger bargaining power of larger buyers this paper provides an alternative explanation and shows that the observed direction of differential pricing can benefit the supplier by lowering the level of tacit collusion its buyers can sustain in their output market this result also provides a new mechanism through which a ban on price discrimination by input suppliers may lower consumer welfare

impact of income on nutrient intakes implications for undernourishment and obesity the relationship between income and nutrient intake is explored nonparametric panel and quantile regressions are used engle curves for calories fat and protein are approximately linear in logs with carbohydrate intakes exhibiting diminishing elasticities as incomes increase elasticities range from 0 10 to 0 25 with fat having the highest elasticities countries in higher quantiles have lower elasticities than those in lower quantiles results predict significant cumulative increases in calorie consumption which are increasingly composed of fats though policies aimed at poverty alleviation and economic growth may assuage hunger and malnutrition they may also exacerbate problems associated with obesity

food preferences and nutrition in rural bangladesh t he dietary choice of households near subsistence levels of nutrient intake is one of obvious policy importance in many countries such as bangladesh national goals are set in terms of nutritional intake and there is heavy intervention in the markets for foods however little is known about the manner in which food preferences vary with food expenditure and nutrient intake the design of efficient programs to aid nutritionally deficient households in attaining minimal levels of nutrient intake requires information on all ownand cross price elasticities for both target and non target groups the net effect of a food price subsidy on the consumption of food nutrients cannot be predicted without knowledge of the complete elasticity matrix results presented below demonstrate that substitution effects can be so strong that the subsidization of certain foods quite often reduces nutrient consumption in this study demand equations for nine foods which allow for extremely flexible consumer price response are estimated from the individual budgets of 5 750 rural bangladeshi households estimation at the household level is preferred because it more readily permits the incorporation of household composition variables into the demand analysis such as household size occupation and employment status that are typically lost in aggregation there is also a greater range and variation in expenditure levels than found in grouped data this is of particular importance in the study of nutritional well being as it is the poorest households which are of special interest moreover the household sample provides sufficient degrees of freedom to estimate a simple varying parameter model which requires the estimation of 270 parameters previous econometric analysis of income class specific dietary choice has been limited and not altogether satisfactory pinstrup anderson de londono and hoover 1976 estimated complete sets of price elasticities for different income strata using frisch s scheme in order to study the impact of changes in relative prices on nutrient consumption their results are suspect because of the assumption of want independence necessary for this methodology to be valid alderman and timmer 1980 who were also concerned with studying the relationship between food price policy and nutrient intake by income classes econometrically estimated separate price coefficients for each income group by including slope dummy variables in their demand equations for rice and cassava in indonesia the inclusion of these dummy variables revealed surprisingly large differences in compensated price response across income groups although their results support the notion that poorer households respond differently to prices than the rich the limitations of their data constrained them to consider only two foods and to specify changes in price response which are discontinuous with respect to income i the formulation and estimation of the food demand equations is discussed in section ii below section iii presents the results of the estimation and discusses the nutritional implications of movements in relative food prices and other exogenous variables section iv summarizes our findings

crises food prices and the income elasticity of micronutrients estimates from indonesia the 2008 global food price crisis and more recent food price spikes have led to a greater focus on policies and programs to cushion the effects of such shocks on poverty and malnutrition analysis of the income elasticities of micronutrients and their changes during food price crises can shed light on the potential effectiveness of cash transfer and nutrition supplement programs this article examines these issues using data from two cross sectional household surveys in indonesia taken before 1996 and soon after 1999 the 1997 98 economic crisis which led to a sharp increase in food prices first using nonparametric and regression methods the article examines how the income elasticity of calories from starchy staples as a share of total calories differs between the two survey rounds second the article estimates income elasticities of important nutrients in indonesia the analysis finds that although summary measures such as the income elasticity of the starchy staple ratio might not change during crises this stability masks important differences across individual nutrients in particular income elasticities of some key micronutrients such as iron calcium and vitamin b1 are significantly higher in a crisis year than in a normal year yet the income elasticities of others such as vitamin c remain close to zero these results suggest that cash transfer programs might be even more effective during crises to ensure the consumption of essential micronutrients but to ensure that all key micronutrients are consumed nutrition supplement programs are also likely required jel classification codes i12 o12 d12 e31 keywords income elasticity crisis prices micronutrients vitamin c starchy staple ratio

a food demand system based on demand for characteristics if there is curvature in the slutsky matrix what do the curves look like and why abstract a food demand system is proposed based on demand for energy variety and tastes of foods by specifying utility as an explicit function of these characteristics the entire matrix of demand elasticities can be derived for n foods and one non food from prior specification of just four elasticities while avoiding any assumption of separability between foods this framework can explain why poorest groups often are most price responsive but also can account for highest price responsiveness by middle income groups the system is applied to published food consumption data for urban and rural populations in pakistan elasticities are compared with those obtained in a published pakistan study applying an almost ideal demand system aids

demand for food fats and oils the role of demographic variables and government donations a systems model of u s food fats and oils demand is estimated using quarterly time series data for the period 1962 87 demographic scaling is used to incorporate demographic variables and per capita government butter donations in addition to price income and demographic demand elasticities dietary fat intake elasticities are calculated for each of the demographic characteristics included in the study all of the five own price elasticities are statistically significant as are fifteen of the twenty cross price elasticities fourteen of the fifteen demographic elasticities are statistically significant

strategic pricing models and interpretation of price war data abstract price wars cartel breakdowns and other seemingly disequilibrium pricing phenomena are examined questions of interest include when do breakdowns occur how long do they last what determines their severity and are they characterized by increased cross sectional price dispersion and or temporal price volatility the first half of the paper explains how the choice of punishment strategy the specification of the stochastic shocks to the system and the assumptions regarding observability determine the pricing dynamics implicit in several theoretical price war models theories are classified into imperfect monitoring models in which players actions cannot be observed learning models in which structural parameters are unknown to the players and cyclical models in which observability is perfect but business cycles affect the difficulty of colluding the second half in contrast examines data on prices actually set by firms in industries which are subject to periodic wars when the models are confronted with the data we can see how well oligopoly theory explains the behavior of the firms in these industries the object of the exercise is not to pick a winner instead the role of industry characteristics in determining pricing dynamics is assessed and the reasons why simple models may fail to explain complex pricing patterns are examined finally directions for future research are suggested by the empirical regularities which are uncovered

the economics of development a survey i the subject our definition of the subject will be the use of economic analysis to understand the economies of poor or developing countries this includes in particular how standards of living in the population are determined and how they change over time and further how policy can or should be used in the influence of these processes the definition contains in principle much or most of analytical methods in economics insofar as they can be put to use in the examination of the issues of interest this is as it should be but it poses a problem for a survey in a journal a comprehensive treatment is infeasible so we shall follow a different route the survey will focus on what i take to be the major themes and approaches which characterise the productive aspects of the subject there is therefore no pretence at being exhaustive the purpose is rather to highlight some of the advances many of these have been of real substance there are a number of possible purposes for a survey and it is important to be clear at the outset for whom it is intended what it is and what it is not this survey is addressed to economists and students of economics who know the tools of their trade but not necessarily how they have been applied to and fashioned for the analysis of the economics of developing countries it is a description of the ways in which problems can be productively formulated and approached in terms of examples chosen for their intrinsic importance and interest the vastness of the subject means that we have to be highly selective it does not seek to provide a summary evaluation of the current view of the appropriate response to immediate policy questions it is not a history of thought nor a research manifesto nor an attempt to adjudicate or settle the major debates where they arise naturally from the major purpose some judgements on these subjects will be offered but they do not themselves constitute the primary intent of this survey there are three lines of enquiry or sets of questions which have i suggest been distinctive of the most fruitful work in development economics they will

effects of food prices and consumer income on nutrient availability economic factors such as food prices and consumer income affect food choices with consequences for the availability of nutrients a new research model is developed to estimate how the availability of 28 nutrients would change as consumers alter their food purchases in response to changes in food prices and income through the interdependent food demand relationships

demand systems estimation with microdata a censored regression approach demand systems estimation increasingly makes use of household level microdata mainly to measure the effects of demographic variables data based on these household expenditure surveys present a major estimation problem for any given household many of the goods have zero consumption implying a censored dependent variable techniques which do not take this censored dependent variable into account will yield biased results we utilize a censored regression approach that is computationally simple consistent and asymptotically efficient the results are then presented and compared with those obtained using an uncensored technique

how well do static indicators identify the chronically poor abstract we investigate how well the most widely used static welfare indicators perform in identifying the chronically poor we propose a normative measure of performance the cost of a given impact on chronic poverty when transfers are contingent upon a purely static indicator using longitudinal household data from rural india we find that current consumption is not always a better indicator of chronic poverty than current income both however perform much better than other common indicators such as food share and access to land

are estimates of calorie income fxelasticities too high a recalibration of the plausible range abstract the wide range of calorie income elasticities in the literature results in large part from the particular calorie and income variables used for estimation elasticities across four estimation techniques and four calorie income variable pairs for a sample of philippine farm households ranged from 0 03 to 0 59 estimates associated with calorie availability are biased upwards first because random errors in measuring food purchases are transmitted by construction both to calorie availability and total expenditures and second because the residual difference between family calorie intake and household calorie availability will often increase with income the calorie intake total expenditure variable pair gives the preferred elasticity estimate in the 0 08 0 14 range

program interventions intrahousehold distribution and the welfare of individuals modelling household behavior abstract in this essay the implications for the intrahousehold distribution of resources derived from economic models of household behavior that treat the household as maximizing a single welfare function are reviewed particular attention is paid to the within family allocation of time and food and to the effects of these resources on the schooling earnings and health status of individuals as they are affected by direct food intervention and female employment schemes and price altering policies empirical applications are provided from data sets from india indonesia and the philippines to illustrate the power and limitations of such models for illuminating household interventions and for placing restrictions on data

storage slow transport and the law of one price theory with evidence from nineteenth century u s corn markets abstract this paper argues that localized price spikes should be a regular feature of competitive commodity markets it develops a rational expectations model of physical arbitrage in which trade takes time and shows that inventory management plays a crucial role in the way regional prices are determined in equilibrium arbitrageurs choose export quantities to ensure inventories in the importing center regularly fall to 0 they earn enough profits from high prices on these occasions to offset small losses at other times an analysis of detailed data from chicago and new york corn markets provides empirical support for the model

oligopoly supergames some empirical evidence on prices and margins this paper is a panel data study on the behavior of prices and margins of oligopolies involved in repeated games the authors examine two supergame models which generate very different predictions about the cyclical behavior of prices and margins evidence on the levels of price cost margins indicates that oligopolies achieve equilibria that more closely resemble a one shot cournot nash outcome than monopoly the authors find however that industries with high price cost margins exhibit cyclical price behavior which is quite different from that of unconcentrated industries little evidence of price wars during either recessions or booms is found copyright 1987 by blackwell publishing ltd

the effect of income on demand for food in poor countries are our food consumption databases giving us reliable estimates abstract cross section estimates of income elasticities for food staples in the aggregate based on quantity information from household food expenditure surveys are often in the 0 3 0 6 range it is shown that differences in per capita calorie intakes across income groups implied by these income elasticities are grossly inconsistent with observed differences in bodyweights moreover time series data frequently indicate that national per capita consumption of food staples in the aggregate remains constant even as per capita gross national product rises substantially cross section income elasticity estimates are biased upwards due to the failure of food expenditure surveys to undertake an accurate accounting of food transfers from high to low income groups biases which are not generated by survey techniques which record food intakes directly

information reliability and a theory of financial intermediation this paper is an analysis of when it will be beneficial for agents engaged in the production of information to form coalitions the model is cast in a financial market framework thus leading to an identification of conditions sufficient for the existence of financial intermediaries intermediation is shown to improve welfare if informational asymmetries are present and the information generated to rectify these asymmetries is potentially unreliable the usual appeal to transactions costs to explain intermediation is not needed

meatpacker conduct in fed cattle pricing an investigation of oligopsony power market power in regional fed cattle markets is measured with an econometric model which links behavior of the margin between boxed beef and fed cattle prices to an economic model of conduct a noncooperative game theoretic model suggests that for tacitly collusive pricing behavior to persist in equilibrium oligopsonists must follow a discontinuous pricing strategy meatpackers pay low prices for cattle during cooperative phases and purchase cattle aggressively during noncooperative phases tests for cooperative noncooperative conduct and measures of market power are presented fed cattle prices in four direct trade regions in the central united states are examined evidence of cooperative noncooperative conduct is present in all markets but has declined over time varying conduct across markets and over time suggests it is important to continue monitoring fed cattle markets to assure a competitive environment

commodity market dynamics and the joint executive committee 1880 1886 using weekly spot and future commodity prices in chicago and new york we construct expected transportation rates for grain between these two cities expected inventory levels in new york and realized errors in the expectations of such variables we incorporate these exogenous commodity market dynamics into porter s 1983 structural modeling of the joint executive committee railroad cartel as in porter we model marginal cost as a parametric function of instrumented output among other factors unlike porter we model pricing over marginal cost as a nonparametric function of a set of variables which include expectations of deterministic demand cycles and cartel stability we estimate the pricing and demand equation simultaneously and semiparametrically our estimated weekly markups during periods of cartel stability are shown to reflect optimal collusive pricing over deterministic business cycles as modeled in haltiwanger and harrington 1991 periods of cartel instability are proven to be trigger

estimating the demand for calories in india this article examines the long run relationship between per capita calorie intake per capita income and food prices using aggregate data for india 1961 1992 cointegration analysis yields an income elasticity of calorie intake of 0 34 while the food price elasticity is insignificant thus economic growth in india as measured by increasing per capita income has significantly improved calorie intake future income growth can alleviate further inadequate nutrition however significant improvements in calorie intake cannot be made directly by food subsidies a further result is that calorie intake is granger caused by income and not vice versa income generation is unconstrained by calorie intake

on the incidence and duration of price wars the purpose of this paper is to test some theoretical predictions about the incidence and duration of price wars when these price wars are viewed as an enforcement device to maintain a cooperative or tacitly collusive agreement in an uncertain environment the theoretical model of green and porter i984 and porter i983a predicts that price wars should be triggered by unanticipated demand fluctuations and that they will be more frequent the greater the number of firms in the industry or the greater the degree of market concentration correspondingly the optimal duration of price wars is also affected by the number of firms the tests employ weekly time series data on the joint executive committee railroad cartel henceforth referred to as the jec from i88o to i886 porter i 983b and lee and porter i 984 previously used this data in order to identify periods in which price wars occurred and to test whether pricing behavior in cooperative periods was consistent with predictions of the theoretical model the present paper will look more closely at the price wars themselves in order to test another set of predictions about their incidence and duration section 2 summarizes the theoretical model in more detail with emphasis on markets with price setting firms the models in green and porter i984 and porter i 983a consider quantity setting firms but the railroads in the jec chose prices not quantities the distinction has some bearing on the econometric work but the basic ideas from the theory still apply there is a brief description of thejec and the data set in section 3 empirical results are covered in section 4 and section 5 contains some concluding comments

the effects of horizontal mergers on competition the case of the northern securities company several recent articles have studied the competitive effects of horizontal mergers by examining rival firms stock price reactions to the merger announcement and subsequent antitrust challenge these articles have consistently failed to find any evidence of anticompetitive effects this article considers two alternative explanations for the previous findings and it sheds some new light on the issue by presenting a case study of the merger that resulted in the formation of the northern securities company in 1901

nutrient demand and the allocation of time evidence from guam this paper presents an econometric study of nutrient intake in guam which explicitly accounts for household time allocation and household capital variables the empirical framework is based on a household production model of nutrient consumption food expenditure and the allocation of time between labour leisure and food preparation activities the study finds evidence that 1 capital and wage variables have significant impacts on households nutrient demands 2 income wage and educational status have very different effects on the nutrient choices of low calorie households than on the nutrient choices of high calorie households and 3 a family s participation in the food stamp programme leads to higher levels of food expenditure but this impact is attributable to the purchase of more costly taste characteristics in food rather than to the purchase of more nutritious foods

determinants of dietary quality evidence from bangladesh summary whereas a large number of studies have been devoted to analyzing consumer demand for dietary quantity much less attention has been paid to the demand for dietary quality to address this gap in the literature this paper explores the determinants of dietary quality in bangladesh using data from a nationally representative household expenditure survey conducted in 2000 we find that while male education plays a positive role female education has a substantially stronger influence further female household headship is associated with lower dietary quality than male headship thus promoting female education and addressing the unique constraints faced by female headed households with respect to diet quality could be a significant policy instrument for addressing food insecurity in bangladesh

nutrient consumption and household income in rural mexico we estimate the income elasticity for a variety of macro and micronutrients using a sample of poor rural households in mexico the nutrientincome elasticity is estimated using both parametric and semiparametric methods a special focus is placed on the nonlinearity of the relationship between nutrient intake and income and on measurement error and endogeneity issues one major finding is that income elasticity for calories is close to zero when we control for measurement error issues for some nutrients namely fats vitamin a and c calcium and heme iron we find a sizeable positive income elasticity robust to the choice of the estimator and percentiles at which it is evaluated these nutrients are also those for which we find the largest deficiency in our sample in addition we find that for the poorest households in our sample the deficiency of total energy protein and zinc is not accompanied by a positive income elasticity

allocation of goods through non price mechanisms evidence on distribution by willingness to wait abstract this paper discusses a model of market clearing when prices are rigid the estimated model is one in which the waiting time necessary to obtain the scarce goods brings the excess demand in line with current supply in a manner of a flexible price the mechanism of such a market has been discussed by barzel and by nichols smolensky and tideman but little empirical evidence has been reported estimation of consumer demand in such a market is presented here heckman s approach to truncated sample estimation has been employed the approach allows modelling of time costs as a two part tariff the results confirm that consumer s response to waiting time is measurable and in the same order of magnitude as expected from response to changes in prices the study also indicates that rationing by willingness to wait does not necessarily distribute goods to the poor

what determines cartel success following george stigler 1964 many economists assume that incentive problems undermine attempts by firms to collude to raise prices and restrict output but the potential profits from collusion can create a powerful incentive as well theory cannot tell us a priori which effect will dominate whether or when cartels succeed is thus an empirical question we examine a wide variety of empirical studies of cartels to answer the following questions 1 can cartels succeed 2 if so for how long 3 what impact do cartels have 4 what causes cartels to break up we conclude that many cartels do survive and that the distribution of duration is bimodal while the average duration of cartels across a range of studies is about five years many cartels break up very quickly i e in less than a year but there are many others that last between five and ten years and some that last decades limited evidence suggests that cartels are able to increase prices and profits to varying degrees cartels can also affect other non price variables including advertising innovation investment barriers to entry and concentration cartels break up occasionally because of cheating or lack of effective monitoring but the biggest challenges cartels face are entry and adjustment of the collusive agreement in response to changing economic conditions cartels that develop organizational structures that allow them the flexibility to respond to these changing conditions are more likely to survive price wars that erupt are often the result of bargaining issues that arise in such circumstances sophisticated cartel organizations are also able to develop multipronged strategies to monitor one another to deter cheating and a variety of interventions to increase barriers to entry

retail price fixity as a facilitating mechanism previous theoretical explanations for retail price fixity show that fixed retail prices can be consistent with either competitive or imperfectly competitive behavior we develop a conceptual model of retail pricing wherein fixed price points are facilitating mechanisms for tacit collusion a non cooperative equilibrium in fixed retail prices is supported through credible threats to revert to nash pricing if cheating is suspected we test the implications of this model using a two stage ordered probit approach in weekly supermarket pricing data the results show that price fixity does support collusive equilibria among retailers but other factors may also explain retail price behavior

in pursuit of monopoly power recent quantitative work in industrial economics this paper reviews empirical work in industrial organization devoted to the question of inferring the existence of monopoly power from data on observed market outcomes like profits and prices the discussion covers inter industry work long conventional in the area newer developments in intra industry analysis and case studies and concludes with some remarks on a small but growing body of work assessing market dynamics the wide range of studies reviewed all generally reveal that market power exists in many industries

wars of attrition in experimental duopoly markets oligopolists often bear large fixed costs these fixed costs can change for example through rising property rents increased taxes and renegotiated labor contracts in this paper we imagine oligopoly market structures that are identical except for the level of fixed costs does this level influence the strategic behavior of firms since marginal profits are unaffected by fixed costs one answer is that there should be no change in behavior alternatively firms may seek more cooperative outputs in order to maintain profits enough cooperation can even generate bigger profits but if fixed costs rise to a level where there are too many firms in the market for any seller to earn an adequate profit a price war could result attrition leaves more profits for the survivors and the higher fixed costs are an increased barrier to later entry thus it also can be argued that greater fixed costs engender less cooperation among rivals because agents are fighting over a smaller profit pie 1 through the use of experimental markets this paper shows that fixed costs do have an influence on the level of cooperation after they have reached a relatively high level in a duopoly market structure subjects as rivals engage in price wars outputs are kept large larger than the cournot level until a rival exits the market by contrast such behavior does not take place when fixed costs are relatively low this difference in behavior at low and high fixed cost levels

using stock price data to measure the effects of regulation the interstate commerce act and the railroad industry this article usesjinancial data to measure the effects of the passage of the interstate commerce act of 1887 and subsequent legislative and judicial developments on firms in the railroad industry the results indicate that the interstate commerce act had a significant positive impact on railroad stock prices and that court decisions in the 1890s which severely restricted the powers of the interstate commerce commission caused negative stock price reactions thesefindings offer support for the revisionist view of regulatory history according to which the railroads welcomed regulation as a means offacilitating the enforcement of cartel like agreements

is the calorie income elasticity sensitive to price changes evidence from indonesia abstract the calorie income demand elasticity is an important parameter in the development literature and in the policy arena yet there is very little evidence on the extent to which it can be considered as an unchanging parameter or a time shifting parameter that for example changes with the economic conditions faced by households in this paper i use data from the 1996 and 1999 susenas surveys in indonesia to examine whether the relationship between income changes and caloric availability has changed and if so how using the same questionnaire the susenas surveys collect detailed information on more than 200 different food items consumed over the last seven days by 60 000 households at the same point in time in each survey year i use nonparametric as well as regression methods to examine two important relationships a the relationship between income and total calories and 2 the relationship between income and calories from cereals and other foods excluding cereals and root crops the empirical analysis finds that the income elasticity of the demand for total calories is slightly higher in february 1999 the crisis year with dramatically different relative prices compared to its level in february 1996 in addition the calorie income elasticity for cereals as a group increases while the calorie income elasticity for other food items decreases the latter finding is interpreted as behavior that is consistent with the presence of a binding subsistence constraint

public policy markets and household coping strategies in bangladesh avoiding a food security crisis following the 1998 floods abstract at their peak the 1998 floods covered two thirds of bangladesh causing severe damage to the major rice crop and threatening the food security of tens of millions of households in this paper we first highlight the contribution of government policy interventions including trade liberalization in the early 1990s to stabilization of rice markets during and after the flood then using a panel data set covering 750 households in three rounds over a 13 month period we analyze impacts of the flood on household assets consumption and nutritional outcomes finally we present empirical estimates of the contribution of rice market stabilization and government transfers to household food consumption

can drought increase total calorie availability the impact of drought on food consumption and the mitigating effects of a conditional cash transfer program abstract this study uses the panel data of a randomized experiment from the mexican progresa program to evaluate the impact of drought on total calorie availability and the mitigating effects of progresa on food consumption in periods of drought drought reduced total expenditures and total food expenditures but increased the total availability of calories this paradox can be explained by the impact of drought on the composition of calories that is it reduced the consumption of expensive calories in such foods as vegetables fruits and animal products but increased calories consumed from cheaper sources such as grains this study finds that progresa can completely mitigate the negative effects of drought on calorie availability from vegetables fruits and other sources however progresa cannot mitigate the impact of drought on calories available from grains the analysis also shows that during drought households who increase their consumption of grains get them mainly from purchased sources rathe

will developing country nutrition improve with income a case study for rural south india aggregate estimates of food expenditure are consistent with such a possibility implying income expenditure elasticities close to one however the high degree of aggregation at which such estimates are made means that the considerable increase in price per nutrient as income increases is ignored and the nutrient elasticities are therefore overstated estimates for a rural south indian sample indicate that this bias is considerable and that the true nutrient elasticities with respect to income may be close to zero

disaggregating food consumption parameters designing targeted nutritional interventions abstract this article is concerned with a new nutritional intervention strategy which is based on the belief that malnourished people eat different types of food to the well nourished the calculation of disaggregated food consumption parameters can identify inferior food commodities and the subsidization of these commodities will target intervention to those most in need the effectiveness of this policy depends on the understanding of its theoretical basis the author introduces the policy maker to this by reviewing the theoretical basis for consumption analysis and then several key studies

the microeconomics of the developmental paradox on the political economy of food price policy abstract a longstanding puzzle in comparative economics is the developmental paradox the tendency for government support for agriculture to increase with national income and to decrease with the proportion of economic activity and of the population in agriculture this paper offers a microeconomic explanation for that puzzle it establishes analytically the microeconomic basis for coalition alignments with respect to food price policy then numerically simulates the comparative static effects of alternative food policies on coalition structure a parsimonious household model applied to a heterogeneously endowed society demonstrates how variation in individual welfare effects might beget distinct coalitions in the debate over food price policy and how those policies are inextricably linked to land population and technology policies in food agriculture moreover coalition alignments on particular policy debates are path dependent in particular food price policy creates its own political support

the determinants of nutrient intake results from western india abstract this paper presents and tests a model of the determinants of nutrient intake the model is based on an identity whereby calorie intake per adult equivalent can be expressed as a function of total expenditure the share of food in the budget a unit value index an expenditure efficiency index and household composition these endogenous variables are in turn expressed as a function of exogenous variables such as assets demographic factors and agricultural technology the results help to explain the large variance in calorie intake at a given level of income and suggest that interesting compensatory behavior occurs by households

does increase in women s income relative to men s income increase food calorie intake in poor households evidence from nigeria this article addresses the important but not widely investigated question of how calorie consumption in african low income households would respond to intrahousehold redistribution of income from men to women specifically i use survey data on a sample of 480 households from semirural areas of south western nigeria to analyze the response of per capita calorie intake to changes in women s share of household income after controlling for per capita income and demographic characteristics at individual household and community levels i also examine the effect of marginal increases in household income on per capita calorie intake conditional on the income distribution factor women s share of income my results suggest that redistributing household income from men to women would neither raise per capita food energy intake nor increase the quality of food calorie source of households in rural south western nigeria i also find that while the income elasticity of quantity of calorie intake is close to zero income elasticity for quality of calorie intake is substantially positive i conclude that neither gender neutral household income increases nor redistribution of household income in favor of women would substantially motivate increased amounts of food energy intake within households in the population under study however gender neutral increase in household income is likely to substantially increase the household demand for high quality food calorie sources

collusion as public monitoring becomes noisy experimental evidence this paper uses laboratory experiments to test the implications of the theory of repeated games on equilibrium payoffs and estimate strategies in an infinitely repeated prisoners dilemma game with imperfect public monitoring we find that subjects payoffs i decrease as noise increases and ii are lower than the theoretical maximum for low noise but exceed it for high noise under the assumption that the subjects strategy uses thresholds on the public signal for transition between cooperation and punishment states we find that the best fitting strategy simply compares the most recent public signal against a single threshold

nutrition health birth order and seasonality intrahousehold allocation among children in rural india abstract nutrients available to children are determined largely by intrahousehold allocations there are a number of reasons why birth order may affect these allocations a model is developed to estimate critical parameters of parental preferences regarding the allocation of nutrients among their children latent variable estimates for rural south india indicate that parental preferences have productivity equity tradeoffs and parents favor older children the productivity equity tradeoff however is much less for the lean season therefore when food is scarcest parents follow more closely a pure investment strategy exposing their more vulnerable children to greater malnutrition tisk

on price risk and the inverse farm size productivity relationship abstract the oft observed inverse relationship between farm size and productivity has elicited several explanations having important policy and theoretical implications using advances in the analysis of price risk effects on producer behavior and a simple two period model of an agricultural household that both produces and consumes under price uncertainty at the time labor allocation decisions are made this paper demonstrates analytically that a non degenerate land distribution and price risk can together produce an inverse relationship even absent any of the more common explanations empirical evidence from madagascar confirms the plausibility of this intuitive explanation for the phenomenon

nutrient elasticities in a complete food demand system this study explores the linkage of the determinants of food choice with consumer nutrient availability by developing a procedure to measure changes in nutrient availability as the demand for food items change it uses demand elasticities from traditional demand analysis to estimate elasticities of changes in the nutritional content of consumer diets the procedure is applied to estimate nutrient elasticities for fifteen nutrients in response to changes in thirty five food prices and per capita income

effects of irrigation induced technological change in bangladesh rice production this paper evaluates the welfare implications of the irrigation induced technological change in rice production based on the conceptual framework of hayami and herdt and using a modified formulation of the problem the analytical model used incorporates demand and supply shifts provides exact measures of changes in consumers and producers surpluses and examines the implications for distributive justice in terms of impacts on incidence and severity of poverty and inequality in income distribution the results of the analysis suggest that irrigation induced technological change would significantly promote distributive justice

cooperation in prices and capacities trade associations in brewing after repeal this study s main contribution is examination of the excess capacity held by brewers during a period in which they tacitly cooperated on price the analysis covers the industry in the united states between repeal of prohibition in 1933 and wartime rationing of raw materials in 1942 from april 1933 to may 1935 destructive price cutting among brewers was illegal under the national industrial recovery act subsequent rivalry among trade associations facilitated the development of tacitly cooperative pricing arrangements the trade associations appear to have adopted a different agenda as cooperation spread among all brewers instead of just facilitating cooperation on price the associations may have facilitated cooperation in the distribution of responsibility for enforcement members apparently distributed responsibility by coordinating the allocation of excess capacity these and other results are interpreted to suggest additional avenues for research on the distribution of responsibility for punishme

demand for nutrients in india 1993 to 2004 in response to the deaton and dreze 2009 explanation of a downward shift in the calorie engel curve in terms of lower requirements due to health improvements and lower activity levels in india we develop an alternative explanation embedded in a standard demand theory framework with food prices and expenditure as a proxy for income cast in a pivotal role we find robust food price and expenditure effects and shifting food price elasticities there are shifts in demands due to factors other than lower requirements so while the deaton and dreze 2009 explanation is not rejected it is arguable that it is complementary to the demand based explanations

protecting energy intakes against income shocks whether and how changes in economic circumstances or household income affect individuals diet and nutritional intakes is of substantial interest for policy purposes this paper exploits a period of substantial income volatility in russia to examine the extent to which as well as how individuals protect their energy intakes in the face of unanticipated shocks to household income using rich data from the russia longitudinal monitoring survey our results suggest that households use substitution disproportionally cutting back spending on non foods to protect spending on foods change the composition of the consumption basket and increase the consumption of cheaper calories taken together however we find that total energy intakes as well as the nutritional composition of the diet are almost fully protected against income shocks specifically we find that 12 16 of the effect of permanent income shocks on food expenditures is transmitted to energy intakes with 84 88 protected through insurance mechanisms

biotechnology for rural nutrition abstract this article evaluates the introduction of algal biotechnology as a nutrition intervention in rural south india in terms of its benefits costs and acceptability to the tastes and income of rural households data were collected from a whole village study and developments in the theory of the economics of tastes are used to analyse the socioeconomic acceptance of algal supplements among the study households the results indicate that the algal food supplement is highly cost effective in providing adequate protein and other micronutrients however the absolute deviation between actual and optimal intake of algal food increased with higher income class several policy implications for food and nutrition interventions in developing countries are derived

does better nutrition raise farm productivity household level data from sierra leone are used to test whether higher caloric intake enhances family farm labor productivity this is the notion behind the efficiency wages hypothesis which has found only weak empirical support a farm production function is estimated accounting for the simultaneity in input and calorie choice instruments include prices household demographic characteristics and farm assets the latter two sets of instruments are later dropped to explore the robustness of the results to different specifications of exogeneity the exercise shows a highly significant effect of caloric intake on labor productivity providing solid support for the nutrition productivity hypothesis the marginal effect on productivity falls drastically as calorie consumption rises but remains positive at moderately high levels of intake one result is a fall in the effective price of food a decline that is larger for households that consumer fewer calories

is there curvature in the slutsky matrix d o the poor substitute among commodities more flexibly than the rich when relative prices change even when compensated for the income effects of the price changes is it necessary to add a third dimension to the slutsky substitution matrix to identify household income in short do the terms of the slutsky elasticity matrix curve smoothly from poor households to rich households in such a way that equation 1 is meaningful

estimation of a two level demand system with limited dependent variables a two level demand model was derived from a strongly separable conditional indirect utility function to analyze dominican rural and urban household consumption at different income levels for samples with significant zero consumption a multivariate limited dependent variable model utilizing the concept of virtual prices was used to obtain consistent estimates of consumption parameters results show that households with higher incomes tend to be less responsive to own price and income changes in consumption of most food and nonfood commodities for demographic variates the elasticities of rice and aggregate food with respect to household composition variables are all positive with few exceptions price and income responses of household food and nonfood consumption have significant policy importance this study provides insights into the consumption behavior of rural and urban dominican households within the framework of a complete demand system three basic groups of determinants of household consumption are explored commodity prices household total expenditure and demographic variables our treatment of these fundamental issues involves the application to demand analysis of a a classical theoretical result about commodity decentralization and price aggregation and b an econometric technique to deal with limited dependent variables in the demand system framework the analysis of detailed commodities is often prohibitive because increasing the size of the demand system substantially increases the number of unknown parameters to estimate a relatively large number of parameters in this study the theoretical implications of twostage budgeting and perfect price aggregation are used to construct a two level demand model that is consistent with constrained util

the intrahousehold demand for nutrients in rural south india individual estimates fixed effects and permanent income good estimates of nutrient intake responses to prices and income are very useful for the evaluation of the numerous efforts to improve nutrition in many developing countries through pricesubsidy and income generation policies we discuss three problems in standard estimates of these responses and then illustrate their implications for nutrient demand relations for a poor sample from rural south india 1 intra household nutrient allocations usually are ignored in this case nutrient intakes for females systematically have algebraically lower price elasticities than do those for males which may leave the females particularly vulnerable at times of food shortages 2 unobserved fixed effects may bias the estimates of responses to observed variables in this case not only the community fixed effects on which the previous literature has focused but also household and individual fixed effects are important failure to control for them results in substantial algebraically upward biases in many estimated price responses 3 most previous studies use current instead of permanent income which a priori may account for the low estimated income elasticities in this case however the use of permanent income does not change the conclusion that the nutrient intakes responses to income are quite small

collusion under risk aversion and fixed costs we analyze collusion under demand uncertainty by risk averse cartels that care about the utility derived from profits with sufficient risk aversion and non trivial fixed operating costs it becomes difficult for cartels to collusively restrict output both when demand is low and marginal dollars are highly valued and when demand is high and potential defection profits are high output relative to monopoly levels becomes a u shaped function of demand greater risk aversion or higher fixed operating costs make collusion more difficult to support in recessions but easier to support in booms

prices infrastructure household characteristics and child height household survey data from brazil matched with information collected at the municipio county level are used to examine the relation between parental characteristics primarily education community infrastructure and services and child height data are drawn from 2 sources informacoes basicas municipais 1974 is a periodic survey of 4000 municipios on infrastructure health and education services estudo nacional da despesa familiar 1974 75 is a household survey covering 37000 children under age 8 on income expenditure anthropometry and socio demographic characteristics local food price indices were derived from these data child height is significantly affected by local infrastructure particularly modern sewerage and piped water in urban areas and electricity in rural settings these effects are stronger for children over 2 those of better educated mothers and those in households spending more higher prices for dairy products and sugar are linked to lower urban child height and higher fish prices to lower rural child height significantly for children of illiterate mothers higher prices for meat and rice are associated with taller height possible because men usually eat these foods mothers with elementary schooling can counteract the effects of food prices on child height number of teachers is positively related to height in rural children numbers of nurses and of hospital beds is associated with shorter children suggesting that large hospitals locate in poor urban areas this study has succeeded in identifying some public investments that affect child health

cartel stability and product differentiation abstract this paper employs a supergame theoretic model of collusion to analyze the effects of different levels of product differentiation on cartel stability in contrast to earlier work the ability of the parties to reach an agreement is assumed here the focus is on how greater product homogeneity increases both the gain to cheating on a collusive agreement and the magnitude of the punishments that follow a defection the total effect on the likelihood a cartel is stable is therefore unclear two particular differentiated products models are then used to demonstrate that contrary to the conventional view greater homogeneity can reduce cartel stability