why is the market for long term care insurance so small abstract long term care represents one of the largest uninsured financial risks facing the elderly in the united states we present evidence of supply side market failures in the private long term care insurance market in particular the typical policy purchased exhibits premiums marked up substantially above expected benefits it also provides very limited coverage relative to the total expenditure risk however we present additional evidence suggesting that the existence of supply side market failures is unlikely by itself to be sufficient to explain the very small size of the private long term care insurance market in particular we find enormous gender differences in pricing that do not translate into differences in coverage and we show that more comprehensive policies are widely available if seldom purchased at similar loads to purchased policies this suggests that factors limiting demand for insurance are also likely to be important in this market our evidence also sheds light on the likely nature of these demand side factors

s p 500 cash stock price volatilities s p 500 stock return volatilities are compared to the volatilities of a matched set of stocks after controlling for cross sectional differences in firm attributes known to affect volatility no significant difference in volatility is observed between 1975 and 1983before the start of trade in index futures and index options since then s p 500 stocks have been relatively more volatile the difference is statistically but not economically significant the relative increase occurs primarily in daily returns and only to a lesser extent in longer interval returns other factors besides the start of derivative trade could be responsible for the small increase in volatility stock price volatility has received much attention in the popular press over the last few years especially since the october 19 1987 stock market crash the rise in volatility has alarmed investors regulators and the public in general some suggest that the start of trade in stock index futures and index options increased speculative activity that in turn destabilized cash markets causing higher volatility large trading activity in the derivative contracts makes the suggestion plausible volume in index futures and index options increased dramatically since their introductions in 1982 and 1983 by 1987 the average daily dollar volume in the s p 500 futures contracts alone exceeded the dollar volume of cash s p 500 trade by a factor of about two while the dollar value of the daily net change in total open interest is about 8 of s p 500 stock dollar volume speculative trade in futures and options frequently is accused of destabilizing underlying cash markets the charge has been made for more than a century in the agricultural precious metal and currency markets recent evidence by french and roll 1986 showing stock variance to be strongly related to trading session hours heightens these concerns unfortunately theoretical analyses of whether speculative trade destabilizes cash markets lead to conflicting conclusions depending on what assumptions are made 1 school of business administration university of southern california and office of economic analysis u s securities and exchange commission i wish to thank mary denny mcsweeny and steve hornstein for their valuable research assistance and the referee and editor for their many suggestions and insights the opinions expressed in this paper do not necessarily reflect those of the u s securities and exchange commission or those of the author s colleagues on its staff an increase in well informed speculative trade has two opposite effects on measured volatility it decreases volatility due to order flow imbalances caused by uninformed traders because informed traders provide liquidity in such events and it increases volatility due to new fundamental information since the information which is assumed to be generated at discrete time intervals is impounded into

spot and futures prices of nonstorable commodities under rational expectations the paper examines the effect of the presence of a commodity futures market upon the price formation process in a stochastic rational expectations framework an optimizing model with price uncertainty and risk aversion is used in order to solve equilibrium distributions of prices for nonstorable commodities the existence of futures trading does not affect the degree of short term spot price fluctuations however if the commodity market disturbance that originates from stochastic consumption demand is serially dependent then the long term price variation is smaller with a futures market than without it futures prices fluctuate less variably over time than spot and expected prices finally there exists a futures intervention rule whereby the authority can stabilize spot prices and raise the overall welfare of society

simulating the impacts of contract supplies in a spot market contract market equilibrium setting this article embeds a principal agent model within a market equilibrium model of contract and cash markets to analyze the impact of contracting on the spot market for hogs the equilibrium model incorporates both quality differentiation in the contract market and an endogenously determined cash market price for three types of contracting scenarios market equilibrium conditions are derived and results are presented for a numerical example contrary to some empirical results our model shows that the increased supply of hogs under typical formula price contracts can increase or decrease the cash market price depending on the relative size of overall contract supplies

determinants of hedging and risk premia in commodity futures markets this paper examines the determinants of commodity futures hedging and of risk premia arising from covariation of the futures price with stock market returns and with the reve nues of producers owing to supply shocks that stochastically redistribute real wealth surplus between producers and consumers and to limited participation in the futures market the total risk premium in the model is not proportional to the contract s covariance with aggregate consumption stock market variability interacts with the incentive to hedge causing the producer hedging component of the risk premium to increase de crease with income elasticity for a normal inferior good production costs that depend on output raise the premium we argue that output and demand shocks will typically be positively correlated raising the premium high supply elasticity reduces the absolute heding premium by reducing the variability of spot price and revenue

the determination of spot and futures prices with storable commodities this paper analyzes the effects of futures trading in a market for a storable commodity in which producers and speculators are assumed to be risk averse and specifications of the aggregate supply and inventory demand functions are derived from explicit optimization a critical aspect is how the parameters of these functions change with the introduction of the future market as it is through these induced parameter changes that the futures market exerts its influence on the spot price the effects of the futures market on both the long run average spot price and its variance are analyzed while we are unable to draw any definitive conclusions on this issue we find that in all cases considered the futures market stabilizes the spot price as well as lowering its long run mean for many years now the question of the effects of futures trading on the stability of spot prices has been extensively debated this topic has been discussed at various levels for example farmers and agricultural interest groups have claimed that futures trading destabilizes spot prices thereby imposing welfare losses on the economy in the united states congress has decided that futures trading can cause price destabilization and has subjected futures trading to the regulation of the commodity futures trading commission at a more analytical level economists have been investigating the issue both empirically and more recently theoretically as well

revisiting incentive effects in workers compensation do higher benefits really induce more claims an important question to ask regarding social insurance programs such as workers compensation wc is to what extent do higher benefits lead to more claims the authors of this study revisit incentive effects of wc using 25 years of data 1977 2004 from the march current population survey cps to estimate the relationship between wc cash benefit levels and the frequency of wc receipt providing new evidence on the subject they demonstrate that conclusions regarding workers incentives to claim benefits differ dramatically depending upon how one controls for the confounding influence of an individual s past earnings the authors expanded empirical specifications which include flexible earnings controls yield benefit participation elasticities smaller than 0 1 their findings suggest that wc claims are not particularly responsive to changes in benefit levels and that labor supply disincentives may warrant less concern than economists or policymakers have typically exhibited the authors also find th

workers compensation and consumption smoothing abstract this paper investigates the consumption smoothing benefits of state workers compensation wc programs these programs are among the largest and most controversial forms of social insurance with the putative purpose of supporting families affected by unexpected income shocks due to workplace injuries and illnesses using health and retirement study hrs data for a sample of workers who have experienced a work related work limiting disability i find that a 10 increase in wc benefit generosity offsets the drop in household consumption upon injury by 3 to 5 moreover my estimates imply that if benefits were very low the drop in consumption upon injury would be in the range of 30 a model adapted from the literature on optimal social insurance yields a formula for the optimal level of wc benefits which depends on empirical estimates of the consumption smoothing parameter my calculations suggest that current wc benefit levels are somewhat higher than optimal

information diversity and market behavior the paper addresses two major issues raised by information diversity in a speculative market first we analyze what property of an investor s information leads to an expected speculative profit and show that independence is more important than accuracy second we consider whether the market price must become fully efficient in the sense that every investor s information is accurately discounted when traders use it rationally as an information source we prove that for any information structure there is a unique equilibrium weighting of investor beliefs at which the price is fully efficient and also every trader s expected profit is zero except for special structures however this equilibrium need not be attained in finite time much of modern capital market theory depends heavily on the assumption that investors know the expected values variances and covariances of asset returns although the assumption of homogeneous expectations is a conventional one and necessary for many theoretical results it is not one which can be offered with much confidence real world investors have access to differing information and may also disagree on the correct interpretation of widely held information when asset returns are assumed to be governed by a known probability distribution many features of trading in real world markets are eliminated from consideration there is no role for information gathering and no way for an investor to profit from having superior information indeed this term has no real meaning since all relevant information is contained in the known returns distribution speculative trading is also hard to explain without divergence of opinion a speculator who thought the market price impounded all available information would never trade against it with heterogeneous information we lose some of the neat results of standard capital market theory but new questions can be addressed about how information diversity among investors affects the markets in which they participate one issue concerns the impact of informational differences on investor profits investors who are better informed than others or are better able to evaluate widely held information should be able to earn higher returns all effort devoted to security analysis and market research depends on the belief that this is so but what makes one investor s information superior to another s beyond the circular observation that those investors with consistent profits must be better informed than those with losses do investors with inferior information however measured continually lose money until they are squeezed out of the market or can an

demand uncertainty and price stabilization price stabilization is an important policy goal of government intervention in competitive markets these policies are primarily directed at raising producer income and stabilizing market prices at levels acceptable to consumers and producers fox 1956 turnovsky 1978 newbery and stiglitz 1979 many of the stabilization policy results have been developed from the study of agricultural commodity markets in these markets prices tend to be highly variable due to uncertain and inelastic supply and demand schultz 1945 gardner 1981

the rational nonpurchase of long term care insurance only a tiny fraction of the nonpoor population currently purchases private insurance coverage against long term care ltc costs studies generally attribute the failure to purchase private coverage to unawareness by potential purchasers of the benefits of coverage and a misperception that medicare currently covers long term care i explore alternative reasons for failure to purchase coverage by well informed expected utility maximizing risk averse individuals for whom ltc is associated with a large increase in mortality and for whom family members represent an alternative source of care there may be no demand for ltc insurance even if it is made available at actuarially fair premiums because the main consequence of coverage is to enhance the expected value of one s estate

futures trading and volatility in the gnma market futures markets for agricultural commodities have existed for well over 100 years recently there has been a major expansion of futures trading into nontraditional areas particularly interest bearing securities and foreign currenciesthe so called financial futures the introduction of exchange traded futures contracts for treasury bills gnma pass through certificates and other securities has created new hedging arbitrage and speculative opportunities for the investors issuers and dealers who are active in the cash markets for these securities futures trading has also opened these markets to participation by new classes of traders particularly private and smaller institutional investors through the process of arbitrage a financial futures market will be closely linked to the cash market for the underlying securities an important concern of the regulatory authorities is what effect opening a futures market is likely to have on an existing cash market the purpose of this paper is to analyze the impact of futures trading in government national mortgage association gnma passthrough certificates on price volatility in the cash market for these securities there are several major ways in which opening futures trading can increase efficiency and smooth price variations in a cash market most importantly futures provide a mechanism for those who buy and sell the actual security or commodity to hedge themselves against unfavorable price changes through the futures market risk can be spread across a large number of investors and transferred away from those hedging spot positions to professional speculators who are more willing and able to bear it this risk transfer may substantially improve the functioning of the spot market because it reduces the need to incorporate risk premia in cash market transactions to compensate for the risk of price fluctuations second futures market may increase the informational efficiency of a cash market since futures prices are determined in a unified highly visible market by traders who specialize in gathering and evaluating information the futures market is expected to be an efficient market in the sense that prices will reflect the best estimate of true future values given the information currently available if anything an informationally efficient futures market should lead to more efficient pricing in the cash market the importance of both of these effects will depend upon the structure of the existing cash market the more developed and integrated is the cash market the

incentive effects of workers compensation insurance abstract this paper uses micro level data from the current population survey to estimate the determinants of participation in state workers compensation programs in the united states the principal finding is that higher workers compensation benefits are associated with greater participation in the workers compensation program after accounting for a variety of covariates in addition the waiting period is found to have a substantial negative effect on program participation finally time series estimates based on the cross sectional model show that the growth in workers compensation claims in the 1970s corresponds reasonably well with the growth in real benefits in this time period

equity efficiency and financial risk of alternative arrangements for funding long term care systems in an ageing society partly a reflection of the increasing volume and hence political influence of the older population recent reforms of long term care ltc systems across developed countries have sought to expand the coverage of the services provided and have defined increasingly universal levels of state support for people with social care needs at the same time some of the factors leading to the expansion of the objectives and ambitions of the care system such as the ageing of the population pose significant challenges to its long term financial sustainability in this context the paper first reviews the main factors likely to contribute to the growth in ltc demand and expenditure and reflects on the policy priorities associated with state backed funding systems in the area using results from a bespoke dynamic micro simulation model it then illustrates the discussion through a quantitative analysis of the equity and efficiency implications of alternative funding models discussed in the context of the ongoing reforms of the ltc system in england

forward market equilibrium economists have long been interested in the functioning of forward futures markets keynes and hicks were the first to write persuasively in support of the theory of normal backwardation this theory says the futures price is biased downward relative to the expected future spot price as a means of compensating speculators for taking long futures positions 12 8 in this theory speculators are viewed as providing insurance to hedgers who desire to take short futures positions to reduce the riskiness of their commodity holdings in addition to normal backwardation there are theories of unbiasedness and normal contango the unbiasedness theory says that the futures price equals the expected spot price while the normal contango theory says that the futures price exceeds the expected spot price 4 19 21 however the controversy over the three theories has not been entirely resolved it has been suggested 4 19 that each of the three theories could be applicable at various points during the planting harvesting processing cycle of a crop as the net hedging demand shifts from a large number of hedgers who desire to be short in the futures market to a large number of individuals who are long hedgers nonetheless the traditional theories of futures markets have been criticized because they are not grounded in a general equilibrium model where participants tastes endowments and beliefs interact so as to generate a market equilibrium incorporating both speculative and non speculative transactions 9 it is the purpose of this paper to provide a framework within which normal contango normal backwardation and unbiasedness can each occur for commodities which have certain well specified characteristics independent of the relative numbers of participants on each side of the futures market in the spirit of 9 we consider the major source of uncertainty to be technological in nature quantity risk and argue that the commonly used definitions of hedger one who sells forward some fraction of his crop yield and speculator are not very useful for economic analysis instead the more generally applicable concept of hedger as one who trades mean income for reductions in risk in the rothschild stiglitz sense 17 is supported because it

an econometric analysis of health care expenditure a cross section study of the oecd countries this paper is an empirical examination of the determinants of aggregate health care expenditure the paper presents a systematic analysis of relationships across 19 oecd countries showing the effects of aggregate income institutional and socio demographic factors on health care expenditure the results indicate that institutional factors of the health systems in addition to per capita gross domestic product gdp contribute significantly to the explanation of the health care expenditure variation between countries for example the way physicians in outpatient care are paid and the mixture of public private funding and inpatient outpatient care

measurement of consumer gains from market stabilization for most cases of practical significance in which partial equilibrium analysis is appropriate there is little difference between exact measures of consumer gains from market stabilization and approximations such as expected change in marshallian or hicksian consumer surplus careful specification of the nature of stabilization is more crucial than the choice of welfare measure it is important to represent correctly the demand curvature and supply response and to determine whether general equilibrium responses can be ignored in any event an improved analytical approximation and a simple numerical method for calculating the exact measures make it unnecessary to rely on suspect measures

testing for long horizon uip using ppp based exchange rate expectations abstract this paper revisits the uncovered interest parity relation it supplements existing work in two ways it focuses on long instead of short term interest rates and related to that employs exchange rate expectations derived from purchasing power parity ppp instead of actual outcomes among the major floating currencies over the period 1975 1997 the paper cannot support the notion of further increases in uip validation beyond that associated with the wave of financial market liberalization and deregulation in the early 1980s

real effects of futures speculation asymptotically rational expectations to what extent does the diversity in the forecasting ability of futures speculators simply result in transfers of wealth among themselves and to what extent does it affect the allocation of resources on the basis of bayesian analysis it is assumed that the variance of forecast errors between the subjective and objective expectations of the subsequent price differs among groups two major conclusions are as follows 1 if given our parameter estimates the forecast error variance of the amateur speculators is less than six times that of the professionals then the existence of futures markets will lower the expected price to consumers increase expected output and lower the variance of the price 2 since small speculators lose to the professionals the relative variance of the forecast error of the amateurs to the professionals exceeds their relative weights as measured by the ratio of numbers to average risk aversion

workers compensation recent developments in moral hazard and benefit payments studies using pre 1990 data generally found benefit and frequency elasticities for workers compensation cash benefits that exceeded respectively 1 0 and 0 an increase in expected benefits appar