issues every plan to reform health care financing must confront this paper focuses on three main issues of fundamental health care reform first should experience rating the linkage of premiums to actual loss experience be retained despite widespread support for experience rating among economists the paper argues that it should be abandoned for reasons of efficiency and equity second would abandonment of experience rating cause much redistribution the paper shows that redistribution among industries could require significant transitional adjustments third should companies or individuals be subject to an insurance mandate the paper calls for combining individual mandates which have long term advantages with employer mandates which have short run pluses

trade migration and integration evidence and policy implications this paper takes as its point of departure the unique position recently adopted by swedish policymakers emphasizing migration as a tool to increase trade we attempt to empirically scrutinize this

disentangling the migration trade nexus the pro trade effects of immigrants and emigrants in the presence of vertical and horizontal product differentiation this paper presents an exploration of the migration trade nexus taking the case of italy by crossing the two dimensions of migration immigration and emigration and the two dimensions of intra ind

claim timing and ex post adverse selection many health care treatments are not urgent and may be delayed if patients so choose because insurance coverage is typically determined by the treatment date individuals may have incentives to strategically delay treatments to minimize out of pocket costs the strategic delay of treatment a particular form of moral hazard can be an important source of subsequent adverse selection in which ex ante identical individuals select insurance coverage based on their differing accumulation of previously delayed treatments this article investigates these forces empirically in the context of the missing market for dental insurance using rich claim level data my analysis reveals that approximately 40 of individuals strategically delay dental treatments when incentivized to do so and this flexibility in delaying treatment can explain why the market for dental insurance has largely unraveled more generally the counterfactual analysis suggests features such as open enrolment periods and contracting on pre existing conditions may be helpful tools in overcoming adverse selection in insurance contexts where the timing of uncertainty is not contractible

the export effect of immigration into the usa much has been written on the connection between migration and international trade human history provides important examples of migrations leading to increased trade activity with perhaps the most well known example of the overseas chinese this study investigates the trade related importance of chinese and other immigrants into the usa previous studies may have underestimated or overestimated the relationship between trade and migration with nations treated as featureless plains rather than as varied landscapes this study contends that an understanding of the immigration trade relationship can be improved upon by examining the specific pattern and destination of immigration into specific us states using state level export data to 28 immigrant source countries in 1993 a strong immigration trade link is found reinforcing conclusions made by previous research using country level data the compelling connection between immigration and trade found in this study and others suggests that future change

overconfidence and asymmetric information the case of insurance this paper contributes to the recent behavioral economics literature by showing that whether or not overconfidence changes qualitative predictions in asymmetric information markets may depend on the market structure itself we first show that overconfidence may overturn fundamental relations between observable variables in perfect competition asymmetric information insurance markets in monopolistic insurance markets in constrast we find that overconfidence may be observationally equivalent to variations in the risk composition of the economy our analysis provides a number of novel testable implications on i price heterogeneity within and across risk classes ii the relationship between ex post risk and insurance coverage iii the fact that a significant fraction of agents chooses to be uninsured and iv the relationship between underinsurance and age

public finance principles and national health care reform public finance principles though usually treated as a minor consideration lie at the heart of effective national health care reform four principles are discussed charge for a service where its cost is created distinguish rents resources and transfers know what services cost and pay accordingly balance distributional and equity concerns the principles implications include since employment does not much affect health costs financing particularly of incremental insureds need not be employer based health resources being immobile many cutbacks in expenditure will not reflect real resource savings and health care financing should mesh with an overall program of taxation and expenditure

alternative health insurance schemes a welfare comparison in this paper we present a simple model of health insurance with asymmetric information where we compare two alternative ways of organizing the insurance market either as a competitive insurance market where some risks remain uninsured or as a compulsory scheme where however the level of reimbursement of loss is to be determined by majority decision in a simple welfare comparison the compulsory scheme may in certain environments yield a solution which is inferior to that obtained in the market we further consider the situation where the compulsory scheme may be supplemented by voluntary competitive insurance this situation turns out to be at least as good as either of the alternatives

international migration and trade agreements the new role of ptas this paper provides an empirical analysis of the relationship between preferential trade agreements ptas and bilateral migration flows building on the empirical literature on the determinants of migration flows i estimate a modified gravity model to assess the role of ptas and their content on bilateral migration flows using a sample of 29 oecd destination countries over the period 1998 2008 i show a strong positive effect of ptas on bilateral migration flows i find that the content of ptas also matters when visa and asylum and labour market related provisions are included in ptas this further stimulates bilateral migration flows different estimation strategies including instrumental variables are employed to address the potential endogeneity bias problems related to ptas and their content

gold and silver health plans accommodating demand heterogeneity in managed competition abstract new regulation of health insurance markets creates multiple levels of health plans with designations like gold and silver the underlying rationale for the heavy metal approach to insurance regulation is that heterogeneity in demand for health care is not only due to health status sick demand more than the healthy but also to other taste related factors rich demand more than the poor this paper models managed competition with demand heterogeneity to consider plan payment and enrollee premium policies in relation to efficiency net consumer benefit and fairness the european concept of solidarity specifically this paper studies how to implement a silver and gold health plan efficiently and fairly in a managed competition context we show that there are sharp tradeoffs between efficiency and fairness when health plans cannot or may not because of regulation base premiums on any factors affecting demand enrollees do not choose the efficient plan when taste e g income can be used as a basis of payment a simple tax can achieve both efficiency and fairness when only health status and not taste can be used as a basis of payment health status based taxes and subsidies are required and efficiency can only be achieved with a modified version of fairness we refer to as weak solidarity an overriding conclusion is that the regulation of premiums for both the basic and the higher level plans is necessary for efficiency

welfare improving asymmetric information in dynamic insurance markets this article presents a two period asymmetric learning model of insurance markets when information about past accidents is not shared by insurers asymmetries of information develop through time equilibrium contracts exist are payoff unique and display a realistic bonus malus pattern eliminating asymmetries through information sharing is welfare decreasing in contrast with past contributions on insurance and adverse selection when second period contract offers cannot be contingent on initial contract choice a strict increase in welfare is obtained through menus of contracts although initial contract choice is in itself worthless information

revisiting the trade migration nexus evidence from new oecd data international migrants contribute to bilateral trade creation if their presence reduces information costs or entails additional demand for goods from their source countries using new data on stocks of foreign born individuals by skill class we try to separately quantify those two channels we assume that improved information affects host countries imports and exports symmetrically while the preference channel matters for imports only on average for differentiated goods both channels contribute evenly toward the total trade creating effect of migration in line with expectations the relative importance of the trade cost channel is largest for homogeneous goods and for high skilled migrants

on the links between stock and commodity markets volatility this paper investigates the links between price returns for 25 commodities and stocks over the period from january 2001 to november 2011 by paying a particular attention to energy raw materials relying on the dynamic conditional correlation dcc garch methodology we show that the correlations between commodity and stock markets evolve through time and are highly volatile particularly since the 2007 2008 financial crisis the latter has played a key role emphasizing the links between commodity and stock markets and underlining the financialization of commodity markets at the idiosyncratic level a speculation phenomenon is highlighted for oil coffee and cocoa while the safe haven role of gold is evidenced

do foreign workers reduce trade barriers microeconomic evidence this paper provides evidence that foreign workers reduce firms trade costs and thus increase the probability that firms export this informs both the literature on trade costs and the microeconomic literature on firms export behaviour we identify the nationality of each worker in a large sample of german establishments and relate this to the exporting behaviour of these establishments we allow for the possible endogeneity of an establishment s workforce by instrumenting the share of foreign workers with the regional distribution of foreign workers in the wider labour market we find a significant effect of worker nationality on exporting which is not driven by the industrial occupational or locational concentration of migrants the effect is much stronger for senior occupations who are more likely to have a role in exporting decisions by the establishment the relationship is also stronger when we consider exports to particular regions and workers from these regions consistent with a gravity model in which trade flows from country i to j are a function of migrants from j in i

transfers in cash and in kind theory meets the data we review theoretical explanations for in kind transfers in light of the limited empirical evidence after reviewing the traditional paternalistic arguments we consider explanations based on imperfect information and self targeting we then discuss the large literature on in kind programs as a way of improving the efficiency of the tax system and a range of other possible explanations including the samaritan s dilemma pecuniary effects credit constraints asymmetric information amongst agents and political economy considerations our reading of the evidence suggests that paternalism and interdependent preferences are leading overall explanations for the existence of in kind transfer programs but that some of the other arguments may apply to specific cases political economy considerations must also be part of the story

immigration and trade creation econometric evidence from canada immigrants may expand trade with their country of origin owing to superior knowledge of or preferential access to market opportunities the authors test this proposition using canadian trade data with 136 partners from 1980 to 1992 in an augmented gravity equation they find that a 10 percent increase in immigrants is associated with a 1 percent increase in canadian exports to the immigrant s home country and a 3 percent increase in imports they also find that among the primary categories of immigrants independents have the greater influence on trade immigration via the entrepreneur class appears to have less impact on trade than all other classes except refugees

pricing and welfare in health plan choice premiums in health insurance markets frequently do not reflect individual differences in costs either because consumers have private information or because prices are not risk rated this creates inefficiencies when consumers self select into plans we develop a simple econometric model to study this problem and estimate it using data on small employers we find a welfare loss of 2 11 percent of coverage costs compared to what is feasible with risk rating only about one quarter of this is due to inefficiently chosen uniform contribution levels we also investigate the reclassification risk created by risk rating individual incremental premiums finding only a modest welfare cost

social insurance and redistribution with moral hazard and adverse selection rochet 1991 showed that with distortionary income taxes social insurance is a desirable redistributive device when risk and ability are negatively correlated this finding is re examined when ex post moral hazard and adverse selection are included and under different informational assumptions individuals can take actions influencing the size of the loss in the event of accident or ill health social insurance can be supplemented by private insurance but private insurance markets are affected by both adverse selection and moral hazard we study how equity and efficiency considerations should be traded off in choosing the optimal coverage of social insurance when those features are introduced the case for social insurance is strongest when the government is well informed about household productivity

insurance as a lemons market coverage denials and pooling abstract the standard monopoly insurance model with adverse selection implies that there are always gains to trade that only the best unobservable risks can go uninsured and that a profit maximizing menu cannot pool all types we show that insurance provision costs can explain both coverage denials only to those likely to be the worst risks and complete pooling specifically we prove a general comparative statics theorem formalizing coverage denials only to those deemed to be the worst risks and two theorems showing that the insurer offers a single contract complete pooling with either zero or positive coverage we point out some implications of these results for empirical work on insurance our results expand upon a point made by hendren 2013 that the main effect of adverse selection on insurance might not be misallocation in active markets the traditional emphasis after rothschild and stiglitz 1976 but simply in shutting down markets as in akerlof 1970 classic lemons model

institutional markets financial marketing and financial innovation firms and institutions are monitored and controlled through a complex set of implicit and explicit contractual relations because of these agency theoretic relations institu tional behavior in financial markets is not a simple reflection of the preference structures of individuals institutional preferences give rise to a demand for new financial instru ments and innovations even when the returns on these instruments are spanned in the sense of complete pricing the innovations can be thought of as solving moral hazard problems an agency theoretic example serves to illustrate the demand supply and financial marketing of stripped securities in short institutions matter the past two decades have witnessed an explosion of financial innovations the changes are too varied and diffuse to permit an easy taxonomy but broadly they seem to fall into two classes first there are the new securities and their markets beginning with puts and calls we have moved on to euromarkets mortgage pass throughs and cmo s strips straps and swaps putable converti bles primes and scores and s p futures and all of the other instruments that inhibit the financial zoo second there are the dynamic trading strategies that make heavy use of the new instruments basket and program trading the asset pricing theories that now characterize different types of money management and the various incarnations of portfolio insurance have changed financial decision making as dramatically as the available array of instruments has changed along with these changes has come an enormous increase in the demand for the services of financial economists we are called upon not only to value the new instruments and the new strategies but to design them as well like engineers

comment defining health insurance affordability unobserved heterogeneity matters affordability is a vague concept bundorf and pauly bundorf m k pauly m v 2006 is health insurance affordable for the uninsured journal of health economics 25 4 650 673 address this problem by establishing clear working definitions of affordability and they use these definitions to estimate the percent of the uninsured who can afford insurance when they establish their definitions of affordability they use a microeconomic model that omits essential characteristics of the health insurance market this comment suggests alternative definitions that better incorporate the structure of the health insurance market discusses both endogeneity and specification problems that might occur when implementing their econometric model to estimate the fraction of uninsured afforders and then recommends ways to reduce omitted variable bias and endogeneity bias

industrial groupings and foreign direct investment we explore worldwide foreign direct investment location decisions by japanese manufacturing firms from 1985 through 1991 our conditional logit estimates provide evidence that firms location decisions are affected by membership in either vertical or horizontal keiretsu consistent with previous studies that stress agglomeration effects on firms location decisions we find that the stock of investment in a region by a firm s vertical keiretsu partners increases the probability of location further we find that the recent flow of investment into a region by a firm s horizontal keiretsu partners increases the probability of investment to the region providing evidence of networking effects

one pool to insure them all age risk and the price s of medical insurance asymmetric information can lead to adverse selection and market failure in a dynamic setting asymmetric information also limits reclassification risk this certainty offsets the costs of adverse selection using a dynamic model of endogenous insurance choice and price calibrated to the u s medical insurance market i find that asymmetric information is pareto improving when information is fully asymmetric however when insurers can discriminate by age group but not within age groups the young benefit by paying less for insurance the insurance market for the near elderly collapses because it is no longer implicitly subsidized by the participation of the young

is there dynamic adverse selection in the life insurance market abstract this paper finds evidence of dynamic adverse selection in the life insurance market lower risk individuals are more likely to cancel a policy and to cancel one of greater face value conditional on cancelation than are individuals with higher mortality risk

adverse selection and regulation in health insurance markets abstract in this paper we look at various ways to regulate the health insurance market and ask whether they provide an answer to the problem of adverse selection to avoid inefficiency government policy must either effectuate some cross subsidization of insurance policies within the state sector or grant private insurance firms an exclusive right to serve certain groups of the population recent reforms in the netherlands and germany and president clinton s proposals for the us could be adapted to fulfil these requirements efficiency cannot be achieved on the other hand if the regulator tries to prescribe cross subsidization within the private sector

health and mortality delta assessing the welfare cost of household insurance choice we develop a pair of risk measures health and mortality delta for the universe of life and health insurance products a life cycle model of insurance choice simplifies to replicating the optimal health and mortality delta through a portfolio of insurance products we estimate the model to explain the observed variation in health and mortality delta implied by the ownership of life insurance annuities including private pensions and long term care insurance in the health and retirement study for the median household aged 51 to 57 the lifetime welfare cost of market incompleteness and suboptimal choice is 3 2 of total wealth

equilibria in health exchanges adverse selection versus reclassification risk this paper studies equilibrium and welfare in a class of regulated health insurance markets known as exchanges we use detailed health plan choice and utilization data to model individual level i projected health risk and ii risk preferences we combine the estimated distributions of risk and risk preferences with a model of competitive insurance markets to predict allocations and prices

the new economic case for migration restrictions an assessment abstract migration barriers tend to reduce global production by impeding efficient spatial reallocation of labor recent research argues for a countervailing effect of barriers tending to raise global production by preventing the spread of impoverishing institutions from poor to rich countries while evidence of this mechanism is scarce it is theoretically plausible at high migration rates we propose and calibrate a simple model of dynamically efficient migration when migrants spread economic institutions between countries the net effect of migration depends on three parameters transmission the degree to which origin country total factor productivity is embodied in migrants assimilation the degree to which migrants productivity determinants become like natives over time in the host country and congestion the degree to which transmission and assimilation change at higher migrant stocks on current evidence about the magnitudes of these parameters dynamically efficient policy would not imply open borders but would imply relaxation of current restrictions

two improvements on the clinton framework i t is wonderful that the clinton administration has created the possibility of major reform of health insurance and medical care while the clinton proposal has many good features this comment will suggest two improvements in its present form the clinton proposal allows states to set up a single payer system or to organize the insurance market making heavy use of large regional alliances i will suggest that states should be allowed a third alternative to organize the insurance market with small alliances an advantage of small alliances comes from the distinction between group and individual purchase of insurance as developed below the second suggested improvement involves the question of rationing which is present now and is inevitable in any system for allocating resources the question is who does it and how the clinton plan chooses to offer relatively comprehensive health insurance coverage to all a more efficient form of rationing might offer basic coverage to all making more use of individually purchased supplemental policies as part of the rationing mechanism

the inefficiency of refinancing why prepayment penalties are good for risky borrowers abstract this paper provides a theoretical analysis of the efficiency of prepayment penalties in a dynamic competitive lending model with risky borrowers and costly default when considering improvements in the borrower s creditworthiness as one of the reasons for refinancing mortgages we show that refinancing penalties can be welfare improving and that they can be particularly beneficial to riskier borrowers in the form of lower mortgage rates reduced defaults and increased availability of credit thus a high concentration of prepayment penalties among the riskiest borrowers can be an outcome of efficient equilibrium in a mortgage market we also provide empirical evidence that is consistent with the key predictions of our model

incentive compatible guaranteed renewable health insurance premiums theoretical models of guaranteed renewable insurance display front loaded premium schedules such schedules both cover lifetime total claims of low risk and high risk individuals and provide an incentive for those who remain low risk to continue to purchase the policy questions have been raised of whether actual individual insurance markets in the us approximate the behavior predicted by these models both because young consumers may not be able to afford front loading and because insurers may behave strategically in ways that erode the value of protection against risk reclassification in this paper the optimal competitive age based premium schedule for a benchmark guaranteed renewable health insurance policy is estimated using medical expenditure data several factors are shown to reduce the amount of front loading necessary indeed the resulting optimal premium path increases with age actual premium paths exhibited by purchasers of individual insurance are close to the optimal renewable schedule we estimate finally consumer utility associated with the feature is examined

immigrant links to the home country empirical implications for u s bilateral trade flows immigrants ties to their home countries can play a key role in fostering bilateral trade linkages immigrant ties include knowledge of home country markets language preferences and business contacts that have the potential to decrease trading transaction costs empirical results for the united states suggest that immigrant links have historically been important in increasing bilateral trade flows with immigrants home countries copyright 1994 by mit press

pegging emerging currencies in the face of dollar swings the aim of this article is to study ruptures of exchange rate pegs by focusing on the fluctuations of the anchor currency we test for the hypothesis that currencies linked to the usd are more likely to loosen their peg when the usd is appreciating while sticking to it otherwise to this end we estimate smooth transition regression models for a sample of 28 emerging currencies over the 1994 2011 period our findings show that while the real effective exchange rates of most of these countries tend to co move with that of the usd in times of depreciation this relationship is frequently reversed when the us currency appreciates over a certain threshold

the benefits of asymmetric markets economists have long been fascinated by the paradox that given favorable conditions people s selfish greed for power and profits can annihilate the very power and profits they lust after and in the process turn the chaos and anarchy of unbridled greed into order and harmony ever since the paradox was first noted generations of economists have admired taught and argued it and the arrow debreu theory of general competitive equilibrium is the culmination of the profession s long struggle to understand fully all its conditions and implications the resulting theory of general equilibrium with its careful setting out of the many conditions on which the conclusions depend and its clarification of the way in which conclusions and underlying conditions are interconnected has rightly been hailed as a remarkable intellectual achievement of course the conditions set out have been chosen with a view to obtaining the conclusions not for their realism and some of them are admittedly and blatantly unrealistic accordingly the important and remarkable results of the theory pertain to an imaginary economy however the theory s portrayal of the market forces that govern resource utilization and allocation resembles our actual economy closely enough to be of great practical importance hence the great attention that the theory has received and the consensus that it represents an important milestone in our understanding of the market economy one must be careful however not to read more into general equilibrium theory than what it says everybody knows that the u s economy is far removed from the theory s imaginary model of perfect competition the empirical evidence on unemployment and capacity underutilization makes that clear but the intellectual pleasure one gets from following the theory s elegant logic and beautiful results easily makes one forget its limitations economists are often so mesmerized by the magic of perfect competition that they neglect or fail to notice other equally important

dynamic inefficiencies in an employment based health insurance system theory and evidence we investigate the effects of the institutional settings of the us health care system on individuals life cycle medical expenditures health is a form of general human capital labor turnover and labor market frictions prevent an employer employee pair from capturing the entire surplus from investment in an employee s health thus the pair underinvests in health during working years thereby increasing medical expenditures during retirement we provide empirical evidence consistent with the comparative statics predictions of our model using the medical expenditure panel survey meps and the health and retirement study hrs our estimates suggest significant inefficiencies in health investment in the united states

does the chinese diaspora speed up growth in host countries summary we compiled a new enhanced data set on the population share of overseas chinese covering 147 countries over the period 1970 2010 linking the migration and economic growth literature this article attempts to estimate the impact of the chinese diaspora on economic growth in host countries regression results from both barro type and dynamic panel data models suggest that a country s initial relative endowment with overseas chinese is positively related to subsequent growth results are robust to a number of sensitivity tests the effect is transmitted via increased trade openness enhanced investment and general tfp effects

political sustainability and the design of social insurance this paper examines how the issue of political support affects the design of social insurance it distinguishes between redistributive character and size of social protection three main results emerge first it may be appropriate to adopt a system which is less redistributive than otherwise optimal in order to ensure political support for an adequate level of coverage in the second voting stage second supplementary private insurance may increase the welfare of the poor even if it is effectively bought only by the rich third the case for prohibiting supplementary private insurance may become stronger when the efficiency of private insurance markets increases

competition and innovation evidence from financial services abstract this paper presents new evidence on the relationship between competition and innovation by extending previous literature from manufacturing to financial services we introduce a new measure of overall innovation by estimating and enveloping annual minimum cost frontiers to create a global frontier the distance to the global frontier constitutes each bank s technology gap which decreases if the bank manages to innovate our innovation measure enables us to derive and estimate the model of aghion et al 2005b at the firm level for the us banking industry based on individual bank call report data for the period 1984 2004 consistent with theoretical and empirical work by aghion et al we find evidence of an inverted u relationship between competition and innovation that is robust over several different specifications further evidence on major structural changes in the us banking industry indicates that banks moved beyond their optimal innovation level and that interstate banking deregulation resulted in lower bank innovation policy implications to financial reform and prudential regulation are discussed also

medical care costs how much welfare loss hardly a week goes by without a front page newspaper article on rising health care costs and the uninsured in this article i focus mainly on costs arguing that the issue has been somewhat misconceived while the level of medical care spending in the u s is a cause for concern the welfare losses associated with rises in that level of spending may not be as large as the public rhetoric can make them seem in fact cost containment may not be as urgent as is widely supposed and some proposed cost containment policies may result in welfare losses for the insured and even increase the number of uninsured

warning labels as cheap talk why regulators ban drugs abstract one explanation for drug bans is that regulators know more than consumers about product quality but why not just communicate the information in their ban perhaps via a would have banned label because product labeling is cheap talk any small market failure tempts regulators to lie about quality inducing consumers who suspect such lies to not believe everything they are told in fact when regulators expect market failures to result in under consumption of a drug and so would not ban it for informed consumers regulators ex ante prefer to commit to not banning this drug for uninformed consumers

health care costs on the rise again since 1999 health care costs have been growing faster than national income this rapid growth has occurred as the ability of private and public purchasers to reduce service utilization and bargain for lower prices has fallen insurers have recouped lost profits through higher premiums and new technologies have driven up costs throughout the sector private insurance market responses to these rising costs may lead to reductions in the number of people with insurance and to increased fragmentation of the insurance market over time technological change in medicine both increases costs and improves the quality of care the challenge for public policy is to maintain insurance and some degree of equity in the face of these rising costs

knowledge of future job loss and implications for unemployment insurance this paper studies the implications of individuals knowledge of future job loss for the existence of an unemployment insurance ui market learning about job loss leads to consumption decreases and spousal labor supply increases this suggests existing willingness to pay estimates for ui understate its value but it yields new estimation methodologies that account for and exploit responses to learning about future job loss although the new willingness to pay estimates exceed previous estimates i estimate much larger frictions imposed by private information this suggests privately traded ui policies would be too adversely selected to be profitable at any price

public versus private insurance system with and without transaction costs optimal segmentation policy of an informed monopolist computer mediated transactions allow insurance companies to customize their contracts while transaction costs limit this tendency toward customization to capture this phenomenon we develop a com

the erosion of colonial trade linkages after independence high trade between countries with colonial ties may be explained by government policies that establish preferential access or as a consequence of networks formed through social interactions using bilateral trade data from 1948 to 2003 we examine the eect of independence on post colonial trade the severing of formal colonial relations can lead to an immediate reduction in trade as preferential access is eliminated as well as a gradual reduction corresponding to the deterioration of trading networks our results reveal that independence reduces colonial trade with its colonizer metropole the reduction cumulates over a 30 year period and the disruption is particularly severe for hostile separations we also find that overall colonial trade falls subsequent to independence but to a lesser extent than trade with the metropole

short term contracts and long term agency relationships abstract long term contracts are valuable only if optimal contracting requires commitment to a plan today that would not otherwise be adopted tomorrow we show that commitments are unnecessary and hence short term contracts are sufficient if 1 all public information can be used in contracting 2 the agent can acess a bank on equal terms with the principal 3 recontracting takes place with common knowledge about technology and preferences and 4 the frontier of expected utility payoffs generated by the set of incentive compatible contracts is downward sloping at all times

the internet and financial market structure financial markets are markets for information as such they are directly influenced by advances in information dissemination storage and processing associated with the commercial development of the internet on the other hand given the long standing centrality of information in financial markets the consequences of the internet for financial markets can be understood as evolutionary rather than revolutionary this article provides a framework for understanding how the historical interplay between information technology and human capital has influenced financial market structure in doing so it sheds light on the recent reorganization of financial markets the daring reader might infer implications for reorganization of product markets where the impact of the internet is more abrupt copyright 2001 oxford university press

a theory of yardstick competition in the typical regulatory scheme a franchised monopoly has little incentive to reduce costs this article proposes a mechanism in which the price the regulatedfirm receives depends on the costs of identical firms in equilibrium each firm chooses a socially efficient level of cost reduction the mechanism generalizes to cover heterogeneous firms with observable differences medicare s prospective reimbursement of hospitals by using diagnostically related groups is a scheme very similar to the one outlined here

persistence in medicare reimbursements and personal medical accounts this study uses the continuous medicare history sample cmhs a longitudinal sample of medicare beneficiaries from 1974 to 1997 to identify persistence in medicare reimbursements consistent estimates of medicare reimbursement persistence are obtained using a dynamic panel tobit model lagged reimbursements are statistically significant in explaining a beneficiary s current year reimbursements yet their effect is moderate in magnitude an additional dollar of medicare spending in the previous year gives rise to 0 19 in spending in the current year for those who have positive expenditures and the effect ranges between 0 16 and 0 25 past spending patterns for up to 5 years are also used to evaluate the out of sample prediction capabilities of a multi equation cross sectional model simulated spending patterns for several cohorts are derived and compared to actual spending the simulated spending distributions are used to study the feasibility of establishing retirement health accounts for medicare patients

unhealthy insurance markets search frictions and the cost and quality of health insurance we analyze the effect of search frictions in the market for commercial health insurance frictions increase insurance premiums enough to transfer 13 2 percent of consumer surplus from fully insured employer groups to insurers approximately 34 4 billion in 1997 and increase insurance turnover by 64 percent for the average pol icy this rent transfer harms consumers and when combined with heightened turnover reduces incentives to invest in future health we also find that a publicly financed insurance option can improve the efficiency of private insurance markets by reducing search fric tion induced distortions in pricing and marketing efforts jel d83 g22 i18 in the united states health insurance for those under age 65 is typically provided through group plans purchased by employers from commercial insurers health insurance is a complex multi attribute service so employers looking to buy insur ance face a difficult shopping problem savvy purchasers must consider which of the many drugs their employees might use are in the insurer s formularies which local physicians are part of the insurer s provider network and what copays fees and deductibles apply to which pharmaceuticals providers and services comparison shopping is made even more difficult by the fact that many aspects of insurance involve commitments to provide services under hard to anticipate contingencies medical underwriting by insurers and the great profusion of insurance products raises administrative costs and increases the complexity of an employer group s

isolating the network effect of immigrants on trade within the migration trade nexus literature this paper proposes a more carefully defined measure of migration business networks and quantifies its impact on bilateral trade using cross sectional data and controlling for the overall bilateral stock of migrants the share of migrants employed in managerial business related occupations has a strong additional effect on trade those immigrants should be the ones directly involved in the diffusion and transmission of information relevant for companies trading with other countries their presence is found to increase the volume of trade especially of imports beyond the already known effect of immigrants or highly educated immigrants when we control for the presence of highly educated immigrants the share of immigrants in business network occupations shows a particularly large effect on trade in differentiated goods we also find that highly educated individuals in business related occupations are those contributing to stimulate import and export by the largest margin business network effects seem particularly important in stimulating exports to culturally different countries such as those with different language and legal origin

the trade facilitation impact of the chinese diaspora using an enhanced data set on the population share of overseas chinese in 1970 and 1990 this paper analyses the impact of the chinese diaspora on facilitating china s bilateral trade during the period 1973 2013 our findings suggest substantial trade creation effects resulting from the presence of ethnic chinese in the trade partner population diaspora impacts on chinese bilateral imports are in general higher than those found for exports coethnic networks play a larger role as long as the partner country does not have an rta with china in place among export sectors effects found were strongest for food as well as for machinery and transport equipment in regard to imports coethnic networks matter mostly for raw materials machinery and transport equipment and chemicals

time consistent health insurance currently available health insurance contracts often fail to insure long term illnesses sick people can suffer large increases in premiums or denial of coverage i describe insurance contracts that solve this problem their key feature is a severance payment a person who is diagnosed with a long term illness and whose premiums are increased receives a lump sum equal to the increased present value of premiums this lump sum allows him or her to pay the higher premiums required by any insurer people are not tied to a particular insurer or a group and the improvement is free insurance companies can operate at zero economic profits and consumers can pay exactly the same premium they do with standard contracts

the global economic crisis and the effect of immigrant workers on native born employment in europe the debate regarding the economic effects of employing immigrants has attracted renewed interest in european countries since the economic crisis we provide an approximation of the labour market effects of immigrant workers in four european countries during the global economic crisis after briefly analysing native and foreign born worker conditions for the most recent period our analysis focuses on the correlation between the stock of immigrant workers and the number of native labour market workers across several segments of the labour market using a simple model approach using eurostat and lfs labour force survey data we estimate a structural dynamic model using the generalised method of moments gmm to examine adjustment dynamics in the labour market and labour market segment and worker educational levels countries of origin and genders overall the empirical results suggest that immigrant labour force effects on native born worker employment rates have been persistent and but weak throughout the business cycle these effects are globally positive and immigrant origins do not appear to change the nature of their impact we offer some explanations for these findings related to dual labour markets and to differences in levels of substitution among native and immigrant workers

budget effects of health care vouchers abstract several proposals aim at developing private insurance markets as a substitute for government financing of health care spending reform proposals typically include the use of the fiscal system we look at the effects of vouchers as an instrument for inducing individuals to opt out from public health insurance plans we show that vouchers do lead individuals mainly good health risks to opt out from the social program this is accompanied by an overall increase in government spending due to transfers to be made unless significant savings due to moral hazard control are available this may run against the government s objective of public spending containment the result is fairly general and does not depend on the existence of a solidarity component as it has been commonly argued

buyer seller relationships in international trade do your neighbors matter abstract using confidential u s customs data on trade transactions between u s importers and bangladeshi exporters between 2003 and 2009 and information on the geographic location of bangladeshi exporters we show that the presence of neighboring exporters that previously transacted with a u s importer is associated with a greater likelihood of matching with the same u s importer for the first time this suggests a role for neighbors in generating importer exporter matches our research design permits us to isolate potential gains from neighborhood exporter presence that are partner specific from overall gains previously documented in the literature

long term short term and renegotiation on the value of commitment in contracting spot contracting generally involves efficiency losses relative to long term contracting it is proved here that short term contracting and renegotiation allow to achieve long run efficiency when transfers are not limited objectives are conflicting and no relevant asymmetric information appears at recontracting dates this last assumption excludes adverse selection but not moral hazard when technologies and preferences are time separable copyright 1990 by the econometric society

the insurance value of state tax and transfer programs abstract this paper estimates the total value that individuals derive from their state s tax and transfer program and shows how this value varies by income the paper decomposes this total value into two components redistributive value which is due to predictable changes in income and family circumstances and insurance value which occurs when taxes and transfers compensate for unexpected income shocks our approach is a forward looking one where we examine income and transfers net of taxes over a 10 year period we model state taxes personal income taxes the eitc and sales taxes and state means tested transfers afdc tanf and medicaid schip the calculations are made using the panel study of income dynamics and allow for analysis of the role of changes in tax and transfer programs demographics and income in the value of state net benefits over a period of more than 30 years we find that the redistributive value of state tax and transfer programs sharply declines with income but that the insurance value is increasing in income the resulting total value still declines with income but not nearly as sharply as the redistributive value hence the insurance value mitigates the incentives for mobility that would undo state redistributive spending

the role of commitment in dynamic contracts evidence from life insurance we use data on life insurance contracts to study the properties of long term contracts in a world where buyers cannot commit to a contract the data are especially suited to test a theory of dynamic contracting since they include information on the entire proele of future premiums all the patterns in the data et the theoretical predictions of a model with symmetric learning and one sided com

from regulated cartel to regulated competition in the dutch health care system abstract health care reform is quite a hot issue in the netherlands today since the early seventies government has been trying to contain health care costs by direct control over prices and productive capacities as the results of this policy were disappointing several proposals were formulated for a structural reform based on a market oriented approach in 1988 the dutch government decided to radically reform the financial structure and organization of the health care system two major issues are the introduction of a national health insurance basic insurance and regulated competition among insurers and among providers compared with the last 15 years this can be considered a 180 degree change over of health care policy because of the revolutionary character of the proposals one can really speak of a perestrojka in the dutch health care system in this paper the recent developments in the dutch health care system will be reviewed first we will deal with the necessity of change in the dutch health care system then the main lines of the government proposals for a new structure of the health care system will be summarized finally the consequences of these proposals for the various parties involved will be discussed

selection in health insurance markets and its policy remedies selection adverse or advantageous is the central problem that inhibits the smooth efficient functioning of competitive health insurance markets even and perhaps especially when consumers are well informed decision makers and insurance markets are highly competitive and offer choice such markets may function inefficiently due to risk selection selection can cause markets to unravel with skyrocketing premiums and can cause consumers to be under or overinsured in its simplest form adverse selection arises due to the tendency of those who expect to incur high health care costs in the future to be the most motivated purchasers the costlier enrollees are more likely to become insured rather than to remain uninsured and conditional on having health insurance the costlier enrollees sort themselves to the more generous plans in the choice set these dual problems represent the primary concerns for policymakers designing regulations for health insurance markets in this essay we review the theory and evidence concerning selection in competitive health insurance markets and discuss the common policy tools used to address the problems it creates we emphasize the two markets that seem especially likely to be targets of reform in the short and medium term medicare advantage the private plan option available under medicare and the state level individual insurance markets

impact of organizational structure on oligopolistic pricing abstract the main point of this paper is to suggest that to maintain price discipline certain organizational and historical features of an industry s information set need to be maintained in particular the place of the pricing decision in the organizational structure of firms is a critical determinant of the equilibrium price level in oligopolistic industries offering products that are commodities the model identifies the dynamics of oligopolistic pricing with price discipline breaking down as a result of intensified non price competition and decentralization of the pricing decision examples from the steel nuclear turbine airline and the telecommunication industries provide some empirical support for the model the analysis integrates industrial organization theory and the behavioral theory of the firm in fact the one thing that his decentralization in early 1988 had accomplished was that it gave the sales force more freedom to interpret orders such as akers s 1989 edict that losing market share would no longer be tolerated salesmen now had much of the control over pricing that had previously been reserved for senior management and they realized even if akers didn t that competitors products were now so similar to ibm s that the only weapon ibm could use to stop market share losses was lower prices the salesmen used their weapon they began a price war that gave customers discounts as high as 50 percent and that eventually rendered list prices meaningless buying a mainframe started to include as much wheeling and dealing as buying a used car in paul carrll s big blues the unmaking of ibm page 221

dynamic inefficiencies in insurance markets evidence from long term care insurance we examine whether unregulated private insurance markets efficiently provide insurance against reclassification risk the risk of becoming a bad risk and facing higher premiums to do so we examine the ex post risk type of individuals who drop their long term care insurance contracts relative to those who are continually insured consistent with dynamic inefficiencies we find that individuals who drop coverage are of lower risk ex post than individuals who were otherwise equivalent at the time of purchase but who do not drop out of their contracts these findings suggest that dynamic market failures in private insurance markets can preclude the efficient provision of insurance against reclassification risk this abstract was borrowed from another version of this item

do high skill immigrants trigger high quality trade this paper investigates the links between product quality and the pro trade effect of ethnic networks using a large panel on bilateral stocks of immigrants with information for 19 oecd destination countries and 177 origin countries in line with the approach of rauch and trindade we classify traded goods according to their quality level and separately estimate pro trade elasticity of ethnic networks for each subgroup we allow for heterogeneity of immigrants according to both the level of per capita income of their country of origin and their education level our findings suggest that the trend of the pro trade effect of immigrants over quality seems to be driven by the north south specialisation across varieties for both supply and demand indeed ethnic networks mostly facilitate imports of those varieties for which their countries of origin have a comparative advantage as for exports ethnic networks are more effective in promoting exports to their homeland of those varieties for which there is relatively higher demand we show that the same trend applies to products characterised by the same degree of differentiation according to the classification proposed by rauch and given their lower liquidity constraints and advantages in human capital we find a greater impact of high skilled migrants consistent across all quality levels

are international trade and factor mobility substitutes abstract this paper analyzes whether factor flows and commodity trade are substitutes or complements i e whether increasing the level of one impacts adversely or favorably on the volume of the other it derives with the aid of a new general equilibrium framework of the world which allows possible differences in factor endowments tastes and technologies across the two trading countries the necessary and sufficient condition for substitutability and complementarity the results are then further examined in two special cases a survey of different concepts of substitutability and complementarity which have appeared in the literature is also given

migrants ancestors and foreign investments we use 130 years of data on historical migrations to the u s to show a causal effect of the ancestry composition of u s counties on foreign direct investment fdi sent and received by local firms to isolate the causal effect of ancestry on fdi we build a simple reduced form model of migrations migrations from a foreign country to a u s county at a given time depend on 1 a push factor causing emigration from that foreign country to the entire u s and 2 a pull factor causing immigration from all origins into that u s county the interaction between time series variation in origin specific push factors and destination specific pull factors generates quasi random variation in the allocation of migrants across u s counties we find that doubling the number of residents with ancestry from a given foreign country relative to the mean increases the probability that at least one local firm engages in fdi with that country by 4 percentage points we present evidence that this effect is primarily driven by a reduction in information frictions and not by better contract enforcement taste similarities or a convergence in factor endowments

reprint of the insurance value of state tax and transfer programs abstract this paper estimates the total value that individuals derive from their state s tax and transfer program and shows how this value varies by income the paper decomposes this total value into two components redistributive value which is due to predictable changes in income and family circumstances and insurance value which occurs when taxes and transfers compensate for unexpected income shocks our approach is a forward looking one where we examine income and transfers net of taxes over a 10 year period we model state taxes personal income taxes the eitc and sales taxes and state means tested transfers afdc tanf and medicaid schip the calculations are made using the panel study of income dynamics and allow for analysis of the role of changes in tax and transfer programs demographics and income in the value of state net benefits over a period of more than 30 years we find that the redistributive value of state tax and transfer programs sharply declines with income but that the insurance value is increasing in income the resulting total value still declines with income but not nearly as sharply as the redistributive value hence the insurance value mitigates the incentives for mobility that would undo state redistributive spending

the multiperiod principal agent problem in repeated principal agent models long term contracts can improve on short term contracts only if they commit either principal or agent to a payoff in some future circumstance lower than could be obtained from a short term contract negotiated if that circumstance occurs we show that efficient contracting under moral hazard alone does not require long term commitment from the principal provided a short term contract can punish the agent sufficiently in a sense made precise it requires no commitment from the agent either then linking payoffs in one period to outcomes in previous periods does not improve the tradeoff between incentives and risk sharing

the impact of foreign aid on migration revisited abstract while policymakers hope to stem migration flows by giving foreign aid existing empirical evidence points in the opposite direction by loosening budget constraints aid tends to encourage people to emigrate in this paper we revisit the aid migration link using a substantially extended and adjusted econometric approach based on a gravity model of international migration in contrast to the previous literature we obtain evidence of a negative relationship between the total aid a country receives and emigration rates this even holds for the poorer part of recipient countries which suggests that the budgetary constraint channel does not play a significant role in shaping migration decisions the most plausible explanation for these contrasting results is that unlike in previous studies we use migrant flows rather than migrant stocks as the dependent variable in substantive terms the limited importance of the budgetary constraint channel might reflect that positive welfare effects of foreign aid tend to manifest themselves in improved public services for the poor rather than higher incomes which is in line with the reorientation of foreign aid towards social sectors under the millennium development goals

reconciling the pattern of trade with the pattern of migration aspects of the brain drain are considered in a theoretical context the emphasis is on the migration of those with managerial skills between countries with abundant skilled labor and those with abundant unskilled labor the results indicate that countries with abundant skilled labor therefore export managers e g through multinational subsidiaries and skilled labor intensive goods yet import skilled employees the brain drain excerpt

organizing the health insurance market this paper presents a new approach to organizing universal health insurance first the government divides the entire population into many large groups then the government creates a federal health insurance system healthfed modeled on the federal reserve system to fill the role now played by the benefits office of a large firm the healthfed would create a short menu of alternatives solicit bids for insuring the entire group and price alternatives there would be redistribution between groups and pricing of alterna tives to reflect optimal social insurance principles there would be no connection between health insurance and employment it may seem odd that this presidential address is my first publication in health economics at the time when i might have been working on an alternative address i was chair of an expert panel for the advisory council on social security looking at issues in both retirement income and medical care 2 in the process of this work i have come up with a new approach to organizing universal health insurance that is the subject of this paper before starting on health insurance i will say a few words about a wider context offering what i will say as an example in that setting 3 a great deal of attention has been focused on the exciting issue of reorganizing economies dropping central planning commonly economists from those countries em brace capitalism or more specifically laissez faire competition with an enthusi asm which exceeds that ofwestern economists although not necessarily western businessmen yet laissez faire capitalism has received little serious support in the west for a very long time we all know the fundamental welfare theorem which shows many ways that capitalism can be imperfect we have also seen a growth in discussion and analysis of the many ways governments can mess up resource allocation the real question is the design of arrangements that try to integrate the things that each type of institution does better this is hard for two reasons one is that it is in the realm of second best with many constraints the more the constraints the harder the analysis the second is that we do not have good positive theories of government behavior good examples yes good theories no thus the analysis is more intuitive less theory driven than in our picture of private markets but also in our private market analyses we have been greatly complicating our picture recognizing all sorts of information imperfec tions that affect the way that private markets work so i will present to you a proposal for universal health insurance meant to combine something that