to float or to fix evidence on the impact of exchange rate regimes on growth we study the relationship between exchange rate regimes and economic growth for a sample of 183 countries over the post bretton woods period using a new de facto classification of regimes based on the actual behavior of the relevant macroeconomic variables in contrast with previous studies we find that for developing countries less flexible exchange rate regimes are associated with slower growth as well as with greater output volatility for industrial countries regimes do not appear to have any significant impact on growth the results are robust to endogeneity corrections and a number of alternative specifications borrowed from the growth literature

measuring contagion between energy market and stock market during financial crisis a copula approach abstract in this paper we apply time varying copulas to investigate whether a contagion effect existed between energy and stock markets during the recent financial crisis using the wti oil spot price the s p500 index the shanghai stock market composite index and the shenzhen stock market component index returns evidence was found for a significantly increasing dependence between crude oil and stock markets after the failure of lehman brothers thus supporting the existence of contagion in the sense of forbes and rigobon s 2002 definition moreover increased tail dependence and symmetry characterize all the paired markets this indicates that significant increases in tail dependence are an actual dimension of the contagion phenomenon and that crude oil and stock prices are linked to the same degree regardless of whether markets are booming or crashing during the sample period finally the contagion effect is found to be much weaker for china than the us the empirical results have potentially important implications for risk management

an expected indemnity approach to the measurement of moral hazard in crop insurance a definition of moral hazard in multiple peril crop insurance is proposed that focuses on expected indemnities rather than input use five years of production and insurance data for a panel of kansas wheat farms is used to empirically test for this type of moral hazard results suggest that moral hazard affects multiple peril crop insurance indemnities in poor production years but that no significant moral hazard occurs in years when growing conditions are favorable

input demand under yield and revenue insurance previous studies disagree on the effects of insurance on fertilizer application rates the effect of increased fertilizer on the probability of low yields primarily determines whether fertilizer and insurance are substitutes or complements we estimate conditional distributions of corn yields to determine if the technical relationship between yields and fertilizer supports the hypothesis that insurance increases optimal application rates our results indicate no support for this hypothesis at all nitrogen fertilizer rates and reasonable levels of risk aversion nitrogen fertilizer and insurance are substitutes suggesting that those who purchase insurance are likely to decrease nitrogen fertilizer applications

capital markets and the exchange rate with special reference to the dollarization debate in latin america the paper reviews the main challenges faced by policymakers in emerging market economies em in light of recent financial crises and taking into account salient factors like the existence of partial dollarization imperfect credibility weak financial systems and contagion the standard theory of optimal currency areas is discussed and criticized for omitting the above factors when these factors are taken into account an extreme foreign exchange regime like dollarization is shown to become much more attractive the paper discusses the pros and cons of dollarization and among other things shows that the lack of a lender of last resort is not necessarily a major drawback in em the paper also discusses inflation targeting it in a formal model it is shown that it could be subject to credibility problems similar to those found in exchange rate based stabilization programs

a model free test for contagion between crude oil and stock markets this paper extends hong et al 2007 s model free test to analyze the contagion a simulation experiment reveals that our test has reasonable size and good power in finite sample we use this test and find the strong evidence of contagion between crude oil and stock markets

input use decisions with greater information on crop conditions implications for insurance moral hazard and the environment emerging precision agriculture technologies allow farms to make input decisions with greater information on crop conditions this greater information occurs by providing improved predictions of crop yields using remote sensing and crop simulation models and by allowing farms to apply inputs within the growing season when some crop conditions are already realized we use a stylized model with uncertainty in yield and price to examine how greater information on crop conditions i e a forecast affects input use for insured and uninsured farms we show that moral hazard decreases farms apply more inputs as the forecast accuracy improves when the forecast indicates good yields and vice versa when the forecast indicates bad yields in the long run moral hazard decreases in response to an improvement in forecast accuracy even though moral hazard decreases in the long run indemnity payments are likely to increase in the long run driven by the increase in moral hazard when the forecast indicates bad crop conditions we use the results of our model to discuss the potential impact of different technologies and types of inputs on the federal crop insurance program and the environment

insurance moral hazard and chemical use in agriculture this paper examines how crop insurance affects corn farmers fertilizer and pesticide use in the u s midwest crop insurance might be expected to affect chemical use because of moral hazard insured farmers may undertake riskier production than do uninsured farmers results suggest that insurance exerts considerable influence on corn farmers chemical use decisions those purchasing insurance applied significantly more nitrogen per acre 19 spent more on pesticides 21 and treated more acreage with both herbicides and insecticides 7 and 63 than did those not purchasing insurance these results suggest that both fertilizer and pesticides may be risk increasing inputs

moral hazard cycles in individual coverage crop insurance this paper examines the moral hazard implications of individual coverage crop insurance contracts individual coverage contracts are informationally superior to standard contracts because the farmer s coverage is proportional to his average historical yield despite this apparent benefit the steady state solution is shown to be characterized by moral hazard cycles where moral hazard is practiced in alternative periods the amplitude of the cycle and thus the variability in planned production is shown to be larger the lower the degree of production uncertainty the fewer the number of years used in the averaging process the higher the coverage threshold and the lower the level of co insurance

one money one market the effect of common currencies on trade currency unions their dramatic effect on international trade a gravity model is used to assess the separate effects of exchange rate volatility and currency unions on international trade the panel data bilateral observations for five years during 1970 90 covering 186 countries includes 300 observations in which both countries use the same currency i find a large positive effect of a currency union on international trade and a small negative effect of exchange rate volatility even after controlling for a host of features including the endogenous nature of the exchange rate regime these effects statistically significant imply that two countries sharing the same currency trade three times as much as they would with different currencies currency unions like the european emu may thus lead to a large increase in international trade with all that that entails andrew rose

hedging with futures does anything beat the naive hedging strategy this paper investigates out of sample performance of the naive hedging strategy relative to that of the minimum variance hedging strategy in which the covariance parameters are estimated from 18 e

dynamic correlation analysis of financial contagion evidence from asian markets we apply a dynamic conditional correlation model to nine asian daily stock return data series from 1990 to 2003 the empirical evidence confirms a contagion effect by analyzing the correlation coefficient series we identify two phases of the asian crisis the first shows an increase in correlation contagion the second shows a continued high correlation herding statistical analysis of the correlation coefficients also finds a shift in variance during the crisis period casting doubt on the benefit of international portfolio diversification evidence shows that international sovereign credit rating agencies play a significant role in shaping the structure of dynamic correlations in the asian markets

when to dollarize implicit in the debate over dollarization are two very different views of the sequencing of policy measures one view is that dollarization to work smoothly and yield more benefits than costs must wait on the completion of complementary reforms the other view is that dollarization need not wait on these other reforms because the very act of dollarizing will produce the changes needed to smooth the operation of the new regime in this paper i consider these arguments as they apply to the cases of labor market reform fiscal reform and financial sector reform i conclude that neither theory nor evidence suggests that removing all scope for an independent monetary policy will necessarily accelerate the pace of reform

the impact of ad hoc disaster and crop insurance programs on the use of risk reducing conservation tillage practices the paper estimates the impacts of risk reducing government programs on the use of conservation tillage no till and other conservation tillage practices in agriculture conservation tillage can be used to reduce production risk from weather shocks however subsidized crop insurance and disaster payments also reduce risk through financial assistance the paper examines the extent to which risk reducing tillage practices and government programs are substitutes for each other the economic model shows that a decline in average weather conditions increases the use of conservation tillage the economic model also shows that the impact of weather risk and risk aversion on risk reducing practices like conservation tillage are ambiguous the effect depends on the degree that losses are offset by government payments the paper uses county level tillage practice data from the conservation tillage information center for the three state region of iowa nebraska and south dakota results are estimated using instrumental variables and spatial panel data techniques instruments for the program participation and payment data include political variables and weather data the empirical analysis shows that recent disaster and indemnity payments are associated with an increase in the use of no till and a decrease in the use of other conservation till results also show that producers in counties with recent drought and flood events are more likely to use other conservation tillage the results imply that there may be unintended impacts of changes to agricultural policies like disaster payments and crop insurance on the use of on farm conservation practices

distinguished lecture on economics in government exchange rate regimes is the bipolar view correct the choice of appropriate exchange rate regime which for economies with access to international capital markets increasingly means a move away from the middle ground of pegged but adjustable fixed exchange rates towards the two corner regimes of either flexible exchange rates or a fixed exchange rate supported if necessary by a commitment to give up altogether an independent monetary policy lawrence h summers 2000 p 8

international experiences with different monetary policy regimes any views expressed in this paper are those of the author only and not those of columbia university or the national bureau of economic research abstract this paper examines the international experiences with four basic types of monetary policy regimes 1 exchange rate targeting 2 monetary targeting 3 inflation targeting and 4 monetary policy with an implicit but not an explicit nominal anchor the basic theme that emerges from this analysis is that transparency and accountability are crucial to constraining discretionary monetary policy so that it produces desirable long run outcomes because the devil is in the details in achieving transparency and accountability what strategy will work best in a country depends on its political cultural and economic institutions as well as on its past history

estimating the prevalence and cost of yield switching fraud in the federal crop insurance program producers who manipulate and switch their reported crop yields between separately insured units can increase their insurance indemnities substantially a statistical model that identifies potential yield switching is developed the unrestricted statistical model is singular and is identified by imposing a mixture of system estimable and system nonestimable restrictions lower bound estimates of yield switching fraud incidence and costs are obtained by applying the model to 207 067 multiple unit producers who purchased crop insurance in 1998

exchange rate regimes for emerging markets moral hazard and international overborrowing this paper investigates the role of the exchange rate regime in a simple fisherian model of the overborrowing syndrome where domestic banks are subject to moral hazard the choice of exchange rate regime may have important implications for the macroeconomic stability of the economy banks that enjoy government guarantees have an incentive to increase foreign borrowing and incur foreign exchange risks that are underwritten by the deposit insurance system in the absence of capital controls this increases the magnitude of overborrowing and leaves the economy both more vulnerable to speculative attack and more exposed to the real economic consequences of such an attack while bad exchange rate pegs will tend to exacerbate the problem of overborrowing in emerging markets it is unclear that flexible exchange rate always dominate fixed exchange rates a good fix one that is credible and close to purchasing power parity may reduce the super risk premium in domestic interest rates and thereby narrow the margin of temptation for banks to overborrow internationally contrary to the current consensus regarding the lessons that should be drawn from the asian crisis a good fix may better stabilise the domestic economy while limiting moral hazard in the banking system

input use under crop insurance the role of actual production history the impact of crop insurance on changes in input use has attracted much attention by economists while there are a number of studies on this topic they frame moral hazard in inputs use in a static model however when agricultural producers are forward looking they would make input allocation decisions realizing that their decisions would affect their future actual production history this in turn affects the probability and size of future indemnity payments thus moral hazard should be framed in a dynamic input use decision model we first show theoretically that under certain feasible conditions a static analysis always results in lower optimal input use when compared to a dynamic one with endogenous actual production history this is because static models fail to recognize the role of actual production history we then run numerical simulations using nitrogen application rates as a case study we find that static models indicate significant reduction in nitrogen use compared to the no insurance scenario whereas the dynamic models with a role for actual production history indicate almost no reduction in applied nitrogen the dynamic analysis not only suggests a near absence of moral hazard but for low coverage rates it results in an optimal nitrogen rate higher than that under the no insurance scenario these findings illustrate the importance of recognizing the role of actual production history in mitigating moral hazard possibilities in crop insurance and the dynamic nature of moral hazard in crop insurance

insurability and moral hazard in agricultural insurance markets pareto optimal and constrained pareto optimal all risk insurance contracts are studied conditions required for emergence of competitive insurance markets are isolated and discussed full insurance contracts are shown to be dominated by contracts involving coinsurance and deductibles if insurers are pseudo risk averse the effect of moral hazard on all risk agricultural insurance indemnity schedules is examined results for indemnity schedules under moral hazard and constant absolute risk aversion show that providing farmers with the incentives to take appropriate actions may imply lower deductibles in the presence of moral hazard than in the absence of moral hazard

the mirage of exchange rate regimes for emerging market countries this paper argues that much of the debate on choosing an exchange rate regime misses the boat it begins by discussing the standard theory of choice between exchange rate regimes and then explores the weaknesses in this theory especially when it is applied to emerging market economies it then discusses a range of institutional traits that might predispose a country to favor either fixed or floating rates and then turns to the converse question of whether the choice of exchange rate regime may favor the development of certain desirable institutional traits the conclusion from the analysis is that the choice of exchange rate regime is likely to be of second order importance to the development of good fiscal financial and monetary institutions in producing macroeconomic success in emerging market countries this suggests that less attention should be focused on the general question whether a floating or a fixed exchange rate is preferable and more on these deeper institutional arrangements a focus on institutional reforms rather than on the exchange rate regime may encourage emerging market countries to be healthier and less prone to the crises that we have seen in recent years

coping with terms of trade shocks pegs versus floats the choice of the exchange rate regime has always been an area of great controversy and debate the discussion has once again taken center stage in the developing world the sequence of currency crises in the 1990 s the success of cultency board arrangements the dollarization plan of ecuador and the apparent swing toward flexible regimes of many emerging economies has revived interest in this debate milton friedman 1953 argued that one of the most important advantages of flexible regimes over fixed regimes is that they can smooth adjustment to real shocks even in the presence of nominal rigidities ever since this has been one of the least disputed benefits attributed to fully flexible exchange rate regimes subsequent to friedman many theories of the international transmission of real shocks have confirmed the original intuition that the shortrun responses to terms of trade shocks should be different across exchange rate regimes here i look at a post bretton woods sample of 74 developing countries to test whether flexible regimes can buffer terms of trade shocks better than fixed regimes

prospective deficits and the asian currency crisis this paper argues that a principal cause of the 1997 asian currency crisis was large prospective deficits associated with implicit bailout guarantees to failing banking systems the expectation that these future deficits would be at least partially financed by seigniorage revenues or an inflation tax on outstanding nominal debt led to a collapse of the fixed exchange rate regimes in asia we articulate this view using a simple model whose key feature is that a speculative attack is inevitable once the present value of future government deficits rises we present empirical evidence in support of the key assumptions underlying our interpretation of the crisis