the optimal threshold for a value added tax abstract one of the key features of a value added tax and often one of the most contentious is the threshold level of turnover at which firms are obliged to register for the tax despite its importance however the question of the appropriate level at which to set this threshold has received little analytical attention this paper first develops a simple rule characterizing the optimal threshold when firms sizes are fixed in terms of a trade off between tax revenues and collection costs it then considers in principle and by simulation the implications for the optimal threshold of the production inefficiencies implied by the differential treatment of those above and below the threshold

universal coverage with supply side reform the impact on medical expenditure risk and utilization in thailand abstract we estimate the impact on out of pocket oop medical expenditure of a major reform in thailand that greatly extended health insurance coverage to achieve universality while implementing supply side measures intended to deliver cost effective care from an increased but modest public health budget difference in differences comparison of groups to whom coverage was extended or deepened with those whose coverage did not change indicates that the reform reduced oop expenditure by 28 on average and by 42 at the 95th percentile of the conditional distribution simulations suggest that exposure to medical expenditure risk was reduced by three fifths on average generating a social welfare gain equivalent to 80 200 of the approximate deadweight loss from financing the reform estimated effects on health care access suggest that the policy managed to reduce households medical expenses while also raising their utilization of both inpatient and ambulatory care

rational household labor supply traditionally household behavior is derived from the maximization of a unique utility function in this paper we propose an alternative approach in which the household is modeled as a two member collectivity taking pareto efficient decisions the consequences of this assumption are analyzed in a three good model in which only total consumption and each member s labor supply are observable if the agents are assumed egoistic i e they are only concerned with their own leisure and consumption it is possible to derive falsifiable conditions upon household labor supplies from both a parametric and nonparametric viewpoint if alternatively agents are altruistic restrictions obtain in the nonparametric context useful interpretation stems from the comparison with the characterization of aggregate demand for a private good economy

the marginal cost of public funds and tax reform in africa abstract in this paper we propose estimates of the marginal cost of public funds mcf in 38 african countries we develop a simple general equilibrium model that can handle taxes on five major tax classes and can be calibrated with little more than national accounts data a key feature of our model is the explicit recognition of the informal economy our base case estimate of the average mcf from marginal increases in all five tax instruments is 1 2 focusing on the lowest cost tax instruments in each country commonly the vat but not always the average mcf is 1 1 finally extending the tax base to include sections of the informal economy by removing some tax exemptions offers the potential for a low mcf source of public funds and a lowering of mcfs on other tax instruments

distortionary taxes and the provision of public goods economists have long been concerned with finding an efficient level of public expenditure the classic statement of the problem was given by paul samuelson 1954 an optimal level of expenditure is where the sum of the marginal rates of substitution between the public good and a reference good equals the marginal rate of transformation between the public good and the reference good mrs mrt however samuelson s formula assumes that all of the revenue needed to finance public goods can be raised with lump sum taxes since this is not generally possible the formula must be modified to account for the distortionary effects of the tax system an appropriate modification is to multiply the cost side of the equation by a term that is commonly called the marginal cost of public funds mcf in the case of samuelson s formula where government is entirely financed with lump sum taxes the mcf would be exactly 1 0 in the traditional view of economists distortionary taxes cause the mcf to be greater than one thus raising the cost of providing public goods in this paper we discuss some cases where the mcf may be less than one we will illustrate this possibility using numerical examples for labor taxes

the dual structure of incomplete demand systems integrability of incomplete demand systems is discussed the concepts of weak integrability quasi expenditure function quasi indirect utility function and quasi utility function are defined their relationships to the expenditure function indirect utility function and utility function are developed the dual structure of the quasi functions permits exact welfare analysis and reveals the conditional preference structure for the commodities of interest new results relating the uniqueness and exactness of consumer s surplus to the structure of the expenditure and indirect utility functions are obtained

how to identify trust and reciprocity this paper uses a three games or triadic design to identify trusting and reciprocating behavior a large literature on single game trust and reciprocity experiments is based on the implicit assumption that subjects do not have altruistic or inequality averse other regarding preferences such experimental designs test compound hypotheses that include the hypothesis that other regarding preferences do not affect behavior in contrast experiments with the triadic design do discriminate between transfers resulting from trust or reciprocity and transfers resulting from other regarding preferences that are not conditional on the behavior of others decomposing trust from altruism and reciprocity from altruism or inequality aversion is critical to obtaining empirical information that can guide the process of constructing models that can increase the empirical validity of game theory

separability partial demand systems and consumer s surplus measures abstract in practice complete demand systems are not estimated rather either an incomplete demand system is estimated or separability is invoked and a partial demand system is estimated this paper considers the relationship between the conventional compensating variation equivalent variation and the corresponding welfare measure that can be derived from a partial demand system and the current budget allocation to the separable group even assuming the separability assumption invoked is appropriate these partial measures provide in general only a limited amount of information about the compensating variation and no information about the equivalent variation great care is therefore needed when using partial welfare measures to evaluate policy

distinguishing trust from risk an anatomy of the investment game the role of trust in promoting economic activity and societal development has received considerable academic attention by social scientists a popular way to measure trust at the individual level is the so called investment game berg dickhaut and mccabe 1995 it has been widely noted however that risk attitudes can also affect decisions in this game and thus in principle confound inferences about trust we provide novel evidence shedding light on the role of risk attitudes for trusting decisions to the best of our knowledge our data are the first rigorous evidence that i aggregate investment distributions differ significantly between trust and risk environments and ii risk attitudes predict individual investment decisions in risk games but not in the corresponding trust games our results are convergent evidence that trust decisions are not tightly connected to a person s risk attitudes and they lend support to the trust interpretation of decisions in investment games

a two constraint almost ideal demand model of recreation and donations an incomplete demand system is developed for recreation and donation choices subject to both money and time constraints the model results in a three good system with an endogenous marginal value of time for estimation the model is implemented by adapting deaton and muellbauer s locally flexible almost ideal demand system to a two constraint recreation model of trips and donations of california whale watchers exact welfare measures are calculated for changes in costs as well as for whale population changes results indicate a use and a nonuse component of overall willingness to pay for increases in environmental quality

predicting the effects of sugar sweetened beverage taxes on food and beverage demand in a large demand system a censored exact affine stone index incomplete demand system is estimated for 23 packaged foods and beverages and a numeraire good instrumental variables are used to control for endogenous prices a half cent per ounce increase in sugar sweetened beverage prices is predicted to reduce total calories from the 23 foods and beverages but increase sodium and fat intakes as a result of product substitution the predicted decline in calories is larger for low income households than for high income households although welfare loss is also higher for low income households neglecting price endogeneity or estimating a conditional demand model significantly overestimates the calorie reduction

substitution between goods and leisure in a developing country the paper explores the substitutability between goods female leisure and male leisure we find that goods and leisure are not separable we then adapt the almost ideal demand system aids to include leisure in the system in the same manner as commodities the model is not sensitive to variations in the assumption of total time available for each individual s work and leisure results from sri lanka indicate the marginal propensity to consume leisure is quite high especially in rural areas this finding has important implications for transfer programs designed to raise food consumption a somewhat surprising complementarity between male and female leisure was also observed a number of goods were found to be complements to both male and female leisure

female labour supply and on the job search an empirical model estimated using complementary data sets we develop an empirical model of labour supply that is consistent with on the job search and which is identified and estimated by combining two data sets the u k family expenditure survey which contains information on income and expenditure and the u k labour force survey which has data on hours and job search behaviour we provide statistical evidence on the compatibility of the two samples for the purposes of estimating our model we find that search has a direct negative effect on hours of work and we establish a strong positive effect of wages on hours

estimating consumption economies of scale adult equivalence scales and household bargaining power how much income would a woman living alone require to attain the same standard of living that she would have if she were married what percentage of a married couple s expenditures are controlled by the husband how much money does a couple save on consumption goods by living together versus living apart we propose and estimate a collective model of household behaviour that permits identification and estimation of concepts such as these we model households in terms of the utility functions of its members a bargaining or social welfare function and a consumption technology function we demonstrate generic non parametric identification of the model and hence of a version of adult equivalence scales that we call indifference scales as well as consumption economies of scale the household s resource sharing rule or members bargaining power and other related concepts copyright 2013 oxford university press

did the junk food tax make the hungarians eat healthier i analyse whether the introduction of the unhealthy food tax lead to significant improvements in the dietary habits of the hungarian population i focus on the consumption of processed and unprocessed food before and after the tax was levied on a range of food high in salt and sugar using data from a large scale household panel data set i estimate the consumed quantities of processed food to decrease by 3 4 due to the unhealthy food tax while the consumed quantities of unprocessed food increased by 1 1 the lowest income groups were the most responsive to the introduction of the tax despite data limitations the results indicate moderate improvement in population diet that is likely to be attributable to the tax

labour supply tax evasion and the marginal cost of public funds an empirical investigation abstract in this paper we extend the concept of marginal cost of public funds itmcf to incorporate tax evasion in the labour market mcf values are also computed from various tax reforms applied to the province of quebec canada 1985 for this purpose a utility based labour supply model that allows for both regular and irregular work activities is used at the benchmark situation the mcf associated with an increase in marginal income tax rates ranges between 1 39 and 1 53 depending upon whether we consider rationing or not moreover the presence of the irregular sector accounts for between 0 02 and 0 05 of this mcf although small in magnitude the impact of the irregular sector increases rapidly with the level of marginal tax rates

on the marginal welfare cost of taxation this paper develops a rigorous partial equilibrium analysis of the determinants of margin al welfare cost mwc of taxes on labor earnings it shows that four key parameters interact to determine the magnitude of mwc using aggregate data and plausible ranges of values for the parameters mwc can vary from under 10 percent to more than 300 percent of marginal tax revenue intermediate parameter values sugge st mwc is in the 25 50 percent range however the more extreme estimates cannot be ruled out on the basis of available evidence suggesting that mwc cannot yet be copyright 1987 by american economic association

the contribution of increased equity to the estimated social benefits from a transfer program an illustration from progresa oportunidades most impact evaluations of conditional cash transfers ccts and unconditional cash transfers ucts focus on the returns to increased human capital investments that will be reaped largely or exclusively in the future e g when current children have increased productivities as adults but the objectives of these programs are not only to increase human capital investments with implications for future levels and distributions of income but also to alleviate current poverty and reduce current inequality the current distributional gains from such programs depend on the degree of inequality aversion in the social welfare function simulations show that for a range of inequality aversion parameters the welfare gains from current redistribution for the mexican progresa cct program can be as large or possibly much larger than the estimated present discounted value of future earnings from human capital investments in lower and upper secondary schooling these moreover are underestimates of the gains from redistribution because in addition to current gains such gains will be augmented in the future through the distribution of the returns on the human capital investments induced by cash transfer programs therefore to fully evaluate such programs it is critical to incorporate the distributional gains not only the impacts on human capital investments

vat base broadening self supply and the informal sector we develop a general equilibrium tax model to evaluate the impacts of equal yield base broadening in indirect taxes from high rate narrow based typically manufactures taxes to broad based taxes including services such as a vat we capture differences in choice of mode of supply between market goods such as manufactures which cannot be supplied other than through the market and self suppliable services and informal sector supplied products using this formulation we are able to provide numerical examples of welfare worsening vat base broadening which expands the tax base from market based manufactures in which there are few or no non taxed supply possibilities to all goods and services where such possibilities exist we show that the usual presumption that there are welfare benefits from equal yield vat base broadening breaks down once tax induced increases in self supply of previously non taxed goods and services and in informal sector activity in small scale construction and other areas are taken into account moreover since untaxed informal sector supply is typically from lower income to higher income households they gain as comparable informal sector activity is taxed under the base broadening change we provide a calibrated version of the model which captures canadian base broadening accompanying the introduction of the canadian vat gst in 1990 results show the change to have been welfare worsening in aggregate but progressive opposite to conventional belief aggregate welfare losses increase sharply if pre existing income taxes enter the analysis since vat induced supply side losses compound with the income tax while consumption side tax rate variance reducing gains do not this abstract was borrowed from another version of this item

shadow economies size causes and consequences using various methods the size of the shadow economy in 76 developing transition and oecd countries is estimated average size varies from 12 percent of gdp for oecd countries to 23 percent for transition countries and 39 percent for developing countries increasing taxation and social security contributions combined with rising state regulations are driving forces for the increase of the shadow economy especially in oecd countries according to some findings corruption has a positive impact on the size of the shadow economy and a growing shadow economy has a negative effect on official gdp growth

coordination with third party externalities abstract when agents face coordination problems their choices often impose externalities on third parties if an agent cares about them or believes others do they can affect equilibrium selection we present evidence from lab experiments showing that changes in the size and the sign of third party externalities have a significant impact on tacit coordination decision makers are more willing to incur a cost to try to avoid imposing a large negative externality on a third party than they are to avoid a small negative externality or to generate a large positive externality however when decision makers incentives are at odds with the interests of third parties many of them appear to ignore third party externalities even if they are large in magnitude and ignoring them implies substantial earning inequalities and reductions in group earnings individuals revealed to be other regarding in a non strategic allocation task often behave as if selfish when trying to coordinate we discuss explanations for our findings

revenue erosion through exemption and evasion in cameroon 1993 abstract the administration of tax statutes materially determines their economic effects a survey of cameroonian businesses a country seemingly typical of its economic level demonstrates widespread erosion of the tax bases paid by businesses through exemptions and evasion businesses seem willing to provide information on these potentially confidential activities the survey provides information on the number of businesses evading taxes or having exemptions on the characteristics of these businesses relative to others on whether businesses maintain information of use to the tax administration on the contacts between the administration and businesses affecting evasion and on penalties imposed by the administration

labour supply household production and intra family welfare distribution abstract this paper demonstrates the importance in conceptual and empirical terms of incorporating household production in models of labour supply to avoid misleading results concerning the intra family distribution of income and behavioural responses to economic policy

quality signaling through certification in developing countries this paper studies how signaling the credence attributes of consumer goods distorts their market equilibrium in developing countries costs of certification sunk in order to achieve credibility play a key role in producing an oligopolistic market leading to high prices that form a barrier for consumers in the south to lower the cost certification is better achieved by a single independent body which can be financed either by end consumers through a fee or by public subsidies the paper identifies the conditions under which each funding mechanism is most efficient taking into account the government s budget constraint the theoretical analysis is motivated with reference to agricultural seed certification

the effects of a fat tax on french households purchases a nutritional approach this article assesses the effects of a fat tax on the nutrients purchased by french households across different income groups this is done by making a preliminary estimation of price elasticities using a complete demand system on household scanner data and by calculating nutrient elasticities using estimated price elasticities we find that a fat tax has small and ambiguous effects on nutrients purchased by french households and a slight effect on body weight in the short run with a greater effect in the long run such a tax generates substantial tax revenue but is highly regressive

vat tariffs and withholding border taxes and informality in developing countries abstract this paper explores the implications of a distinctive feature of the value added tax vat that is stressed by practitioners but has been largely overlooked by theorists that it functions in part as a tax on the purchases of informal operators from formal sector businesses and not least on their imports it also stresses the potential importance of the withholding taxes that are levied by many developing countries which have also been ignored it is shown in a simple model of informality that if both of these instruments are optimally deployed then the usual prescription that a small economy should not deploy tariffs remains valid even in the presence of an informal sector and a simple strategy is established generalizing the standard prescription developed in models without informality for deploying these instruments so as to preserve government revenue and increase welfare in the face of efficiency improving tariff cuts conditions are established under which a vat alone is fully optimal precisely because it is in part a tax on informal sector production but they are restrictive in general an efficient tax structure requires deploying both a vat and withholding taxes

collective labor supply and welfare the paper develops a general collective model of household labor supply in which agents are characterized by their own possibly altruistic preferences and household decisions are only assumed to be pareto efficient an alternative interpretation is that there are two stages in the internal decision process agents first share nonlabor income according to some given sharing rule then each one optimally chooses his or her own labor supply and consumption this setting is shown to generate testable restrictions on labor supplies moreover the observation of labor supply behavior is sufficient for recovering individual preferences and the sharing rule up to a constant finally the traditional tools of welfare analysis can be adapted to the new setting

optimal dynamic carbon taxes in a climate economy model with distortionary fiscal policy how should carbon be taxed as a part of fiscal policy the literature on optimal carbon pricing often abstracts from other taxes however when governments raise revenues with distortionary taxes carbon levies have fiscal impacts while they raise revenues directly they may shrink the bases of other taxes e g by decreasing employment this article theoretically characterizes and then quantifies optimal carbon taxes in a dynamic general equilibrium climate economy model with distortionary fiscal policy first this article establishes a novel theoretical relationship between the optimal taxation of carbon and of capital income this link arises because carbon emissions destroy natural capital they accumulate in the atmosphere and decrease future output consequently this article shows how the standard logic against capital income taxes extends to distortions on environmental capital investments second this article characterizes optimal climate policy in sub optimal fiscal settings where income taxes are constrained to remain at their observed levels third this article presents a detailed calibration that builds on the seminal dice approach but adds features essential for a setting with distortionary taxes such as a differentiation between climate change production impacts e g on agriculture and direct utility impacts e g on biodiversity existence value the central quantitative finding is that optimal carbon tax schedules are 8 24 lower when there are distortionary taxes compared to the setting with lump sum taxes considered in the literature

taxation base in developing countries abstract informal sectors are larger in developing countries than in rich countries this is a result of higher fixed costs of entry into the formal economy in developing countries we show that raising barriers to entry is consistent with a deliberate government policy for raising tax revenue by generating market power and hence rents for the permitted entrants market entry fees foster the emergence of large taxpayers the rents can be readily confiscated by the government through entry fees and taxes on profits at a low administrative cost the relevance of the theory is assessed with a sample of 64 countries empirical analysis supports the results of the paper

second best optimal taxation of capital and labor in a developing economy abstract as commercial integration reduces the reliance on foreign trade taxation raising tax revenue has become a major concern for the governments of developing economies this paper examines how the tax burden in a developing economy should be distributed between capital income and labor income we study a two sector model where the traditional sector is informal and consequently cannot be taxed by the government in this setup we find that the optimal second best tax structure in order to raise a certain amount of revenue requires to tax capital income at least as much as labor income and possibly more

life cycle effects of age at school start in sweden children typically start school the year they turn seven we combine this school entry cutoff with individuals birthdates to estimate effects of school starting age ssa on educational attainment and long run labour market outcomes we find that school entry age raises educational attainment and show that postponing tracking until age 16 reduces the effect of ssa on educational attainment on average ssa only affects the allocation of labour supply over the life cycle and leaves prime age earnings unaffected but for individuals with low educated parents we find that prime age earnings increase in response to age at school start

do education and health conditions matter in a large cash transfer evidence from a honduran experiment the paper analyzes a new honduran conditional cash transfer experiment bono 10 000 in which 150 poor villages of 300 were treated the transfers were much larger in size than an earlier experiment galiani mcewan 2013 but yielded smaller full sample effects on school enrollment child labor participation and measures of health service use one explanation is that bono 10 000 did not apply conditions to children only one child in eligible households was subject to the education condition and young children and mothers were only subject to health conditions in the absence of older children consistent with this we find a large effect on enrollment and a nearly off setting one on child labor among only children and smaller and insignificant effects on children in larger households we only find significant effects on health service use among children and mothers in the absence of older children despite a much smaller household transfer the heterogeneity does not appear to be driven by correlated variables such as household size child age or poverty

against parsimony three easy ways of complicating some categories of economic discourse economics as a science of human behavior has been grounded in a remarkably parsimonious postulate that of the self interested isolated individual who chooses freely and rationally between alternative courses of action after computing their prospective costs and benefits in recent decades a group of economists has shown considerable industry and ingenuity in applying this way of interpreting the social world to a series of ostensibly noneconomic phenomena from crime to the family and from collective action to democracy the economic or rational actor approach has yielded some important insights but its onward sweep has also revealed some of its intrinsic weaknesses as a result it has become possible to mount a critique which ironically can be carried all the way back to the heartland of the would be conquering discipline that the economic approach presents us with too simpleminded an account of even such fundamental economic processes as consumption and production is the basic thesis of the present paper this abstract was borrowed from another version of this item

tax revenue and the marginal cost of public funds in sweden abstract we assess the welfare cost of raising a marginal unit of tax revenue in a balanced budget general equilibrium framework the calculated social cost of an increment of public funds is sensitive to both the specific type of tax increase and the type of public spending used on the margin best guess assumptions on labor supply elasticities yield marginal costs of public funds for different fiscal mixes of between 0 67 and 4 51 at prevailing tax rates in sweden alternative labor supply assumptions well within the range of current estimates substantially affect the results and can imply infinite marginal welfare costs marginal welfare costs are also sensitive to assumptions about both the income and substitution effects of labor supply

an economy of scales a selective review of obesity s economic causes consequences and solutions this paper reviews the economic research on obesity covering topics such as the measurement of and trends in obesity the economic causes of obesity e g the monetary price and time cost of food food assistance programs income education macroeconomic conditions and peer effects and the economic consequences of obesity e g lower wages a lower probability of employment and higher medical care costs it also examines the extent to which obesity imposes negative externalities and economic interventions that could potentially internalize such externalities such as food taxes subsidies for school based physical activity programs and financial rewards for weight loss it discusses other economic rationales for government intervention with respect to obesity such as imperfect information time inconsistent preferences and irrational behavior it concludes by proposing a research agenda for the field overall the evidence suggests that there is no single dominant economic cause of obesity a wide variety of factors may contribute a modest amount to the risk there is consistent evidence regarding the economic consequences of obesity which are lower wages and higher medical care costs that impose negative externalities through health insurance studies of economic approaches to preventing obesity such as menu labeling taxes on energy dense foods and financial rewards for weight loss find only modest effects on weight and thus a range of policies may be necessary to have a substantial effect on the prevalence of obesity

implications of a sugar sweetened beverage ssb tax when substitutions to non beverage items are considered abstract using the 2006 homescan panel we estimate the changes in energy fat and sodium purchases resulting from a tax that increases the price of sugar sweetened beverages ssbs by 20 and the effect of such a tax on body weight in addition to substitutions that may arise with other beverages we account for substitutions between ssbs and 12 major food categories our main findings are that the tax would result in a decrease in store bought energy of 24 3 kcal per day per person which would translate into an average weight loss of 1 6 pounds during the first year and a cumulated weight loss of 2 9 pounds in the long run we do not find evidence of substitution to sugary foods and show that complementary foods could contribute to decreasing energy purchases despite their significantly lower price elasticity the tax has a similar effect on calories for the largest purchasers of ssbs

a reconsideration of the sugar sweetened beverage tax in a household production model abstract we study the impact of a hypothetical tax on sugar sweetened beverages ssbs on the u s households nutrients purchase welfare change and health benefit differently from the traditional approach food at home fah is here defined as a home good instead of a market good and consumers demands derived under the assumption that households maximize utility subject to both a money and a time constraint the model is estimated by using an incomplete approximate exact affine stone index easi demand system on a data set built by merging the u s consumer expenditure and time use surveys results show that a ssb tax would be much more effective in decreasing household nutrients purchase than it would appear by estimating a model neglecting time costs in home food production due to a lesser compensation of calories from increasing fah consumption a tax induced 38 increase in ssb price is predicted to decrease the per capita energy purchase by 41 kcal day

empirical specification requirements for two constraint models of recreation choice two constraint models are common in recreation demand analysis because of the important role time can play in consumer choices two versions of roy s identity hold for these models and imply coefficient restrictions on empirical demand functions the two constraint restrictions are fully observable and can be expressed in a form analogous to the slutsky hicks equations in single constraint consumer models empirical specifications that use full prices and full budgets can be consistent with the two constraint models when the marginal value of time is either exogenous or endogenous but models with full prices and money income alone are not copyright 2001 oxford university press

collective labour supply with children we extend the collective model of household behavior to allow for the existence of public consumption we show how this model allows the analysis of welfare consequences of policies aimed at changing the distribution of power within the household our setting provides a conceptual framework for addressing issues linked to the targeting of specific benefits or taxes we also show that the observation of the labor supplies and the household demand for the public good allow one to identify individual welfare and the decision process this requires either a separability assumption or the presence of a distribution factor

the effects of taxes on purchases of sugar sweetened carbonated soft drinks a quantile regression approach the consumption of large quantities of sugar sweetened carbonated soft drinks sscsd may lead to obesity which is associated with health problems such as diabetes cardiac diseases and mental health problems the effects of increasing the value added tax vat on purchases of sscsd are estimated obesity is more likely among heavy drinkers than among light or moderate drinkers therefore the effects on high and low purchasing households are estimated by using quantile regressions qrs on norwegian household purchase data since many households did not purchase sscsd during each survey period censored as well as ordinary qrs are used our results suggest that a vat increase from 13 to 25 will have the highest percentage effect among low purchasing households but the absolute effect is highest among high purchasing households low purchasing households will reduce their purchases by about 5 l while the reduction is almost 20 l among high purchasing households however the effects among high purchasi

integrability of incomplete systems of demand functions the problem of integrating back from an incomplete set of demand functions to a utility function is considered conditions permitting local integrability are analogous to those which arise in local integrability theorems for complete systems but the analysis of the global integrability of incomplete systems differs markedly from that of complete systems

time to eat household production under increasing income inequality eating requires the raw food materials that make up meals and also the time devoted to buying food preparing meals and eating them and cleaning up afterwards using time diary and expenditure data for the u s for 1985 and 2003 i examine how income and time prices affect time and goods inputs into this household produced commodity focusing on these two years between which income and earnings inequality increased allows examining how household production is affected by changing economic opportunities the results demonstrate that both inputs into eating increase with income and that higher time prices at a given level of income reduce time inputs over this period the relative goods intensity of producing this commodity increased especially at the lower part of the income distribution and the average time input dropped substantially the results are consistent with goods time substitution being relatively difficult for eating and with substitution being more difficult as production expands

it takes two to cheat an experiment on derived trust abstract social life offers innumerable instances in which trust decisions involve multiple agents of particular interest is the case when a breach of trust is not profitable if carried out in isolation but requires an agreement among agents in such situations the pattern of behaviors is richer than in dyadic games because even opportunistic trustees who would breach trust when alone may act trustworthily based on what they believe to be the predominant course of action anticipating this trusters may be more inclined to trust we dub these motivations derived trustworthiness and derived trust to capture them we design a collective trust game and study it by means of a laboratory experiment we report that overall levels of trustworthiness are almost thirty percentage points higher when derived motivations are present and this generates also higher levels of trust in our set up the effects of derived trustworthiness are comparable in size to positive reciprocity and more important than concerns for equality

paving streets for the poor experimental analysis of infrastructure effects abstract we provide the first experimental estimation of the effects of the supply of publicly financed urban infrastructure on property values using random allocation of first time street asphalting of residential streets located in peripheral neighborhoods in mexico we show that within two years of the intervention households are able to transform their increased property wealth into significantly larger rates of vehicle ownership household appliances and home improvements increased consumption is made possible by both credit use and less saving a cost benefit analysis indicates that the valuation of street asphalting as capitalized into property values is about as large as construction costs

the adoption of network goods evidence from the spread of mobile phones in rwanda this article develops a method to estimate and simulate the adoption of a network good i estimate demand for mobile phones as a function of individuals social networks coverage and prices using transaction data from nearly the entire network of rwandan mobile phone subscribers at the time over 4 5 years i estimate the utility of adopting a phone based on its eventual usage subscribers pay on the margin so calls reveal the value of communicating with each contact i use this structural model to simulate the effects of two policies a requirement to serve rural areas lowered operator profits but increased net social welfare developing countries heavily tax mobile phones but standard metrics that neglect network effects grossly understate the true welfare cost in a growing network which is up to 3 12 times the revenue raised shifting from handset to usage taxes would have increased the surplus of poorer users by at least 26

understanding overeating and obesity abstract the combination of economic and biological factors is likely to result in overeating in the current environment of cheap and readily available food this propensity is shown using a dual decision approach where choices reflect the interaction of a deliberative system operating as in standard economic models and an affective system that responds rapidly to stimuli without considering long term consequences this framework is characterized by excess food consumption and body weight in that individuals prefer both ex ante and ex post to eat and weigh less than they actually do with weight loss attempts being common but often unsuccessful or only partially successful as in the standard model weight is related to prices however another potentially important reason for rising obesity is that food producers have incentives to engineer products to stimulate the affective system so as to encourage overeating data from several sources are used to investigate predictions of the dual decision model with the evidence providing broad support for at least some irrationality in food consumption most importantly there is little indication that the large secular increases in body mass index have been accompanied by corresponding growth in utility maximizing weight one result is that efforts to reduce weight have become more common as obesity has increased

tax reform and u s economic growth in this paper we evaluate the impact of the tax reform act of 1986 on u s economic growth we first calculate effective tax rates on income from capital employed in corporate noncorporate and household sectors we then project the future growth of the u s economy with and without the 1986 tax reform we find that much of the potential gain in welfare was dissipated through failure to index the income tax base for inflation the most promising avenue for future reform is to include income from household assets in the tax base while reducing tax rates on business income