Value-at-risk Trade-off and Capital Allocation with Copulas

This paper uses copula functions to evaluate tail probabilities and market risk trade-offs at a given confidence level, dropping the joint normality assumption on returns. Copulas enable one to represent distribution functions separating the marginal distributions from the association structure. We present an application to two stock market indices: for each market we recover the marginal probability distribution. We then calibrate copula functions and recover the joint distribution. The estimated copulas directly give the joint probabilities of extreme losses. Their level curves measure the trade-off between losses over different desks. This trade-off can be exploited for capital allocation and is shown to depend on fat tails.
(J.E.L.: C14, G19, G29).     

Monetary Regime Choice and Optimal Credit Rationing at the Official Rate: The Case of Russia

ABSTRACT

Stabilizing monetary policy in a small open economy is constrained by the open economy trilemma. In this paper, we investigate whether foreign exchange market interventions and the Central Bank’s credit rationing at the official rate (CROR) may soften this constraint and improve the results of monetary policy for different monetary regimes. We construct a dynamic stochastic general equilibrium (DSGE) model appropriate for analyzing the forward-looking behavior of households facing non-zero probabilities of losing access to financial market and CROR. We have found significant credit rationing in the quarterly Russian data of 2001:Q1–2014:Q2. The probability of losing access to financial market and the probability of CROR are estimated as 22% and 66%, respectively. Using Russian data of 2001:Q1–2014:Q2 we demonstrate that CROR provoked forward-looking activity in financial market, which led to more Ruble devaluation in the crises of 2008–2009. It improved poor countercyclical performance of two Russian monetary policy rules, whereas made small effect on welfare. Welfare maximization exercises reveal a tradeoff between low-inflation and high-welfare solutions and favor of a floating exchange rate regime. We found the optimal value of the probability of CROR in both exchange rate-based and Taylor rule-based models but resulting improvement in welfare is very small.     

Transitions across labor market states including formal/informal division in Egypt

This study examines the worker transitions across labor market states including formal/informal division using panel data of 2006 to 2012 from Egypt. We generate a broad set of facts about labor market dynamics in Egypt. We first develop transition probabilities by gender across different labor market states including formal/informal sectors utilizing Markov transition processes. Government employment is the most persistent labor market state for both men and women and the out of labor force is the second most persistent labor market state for women. Unemployment is the most mobile labor market state. Informal private wage work and self‐employed–agriculture are also relatively mobile labor market states. We next identify the effects of individual, household and job characteristics on different mobility patterns by estimating multinomial logit models. We find that gender, age, education, experience, and several sectors of economic activity are associated with the transition probabilities between the labor market states considered such as formal wage, informal wage, self‐employment, unemployment, government employment, and out of labor market. Education, in particular, university degree or above is noted to play a vital role in the probability of transitions across several labor market states.     

Economic Valuation of the Threat Posed by the Establishment of the Asian Tiger Mosquito in Australia

Invasive species policy could be better informed if we understood how much people value reductions in the risks posed by these organisms. This study investigates the public’s willingness to pay (WTP) for additional measures to reduce the risk of invasion of the Australian mainland by the Asian tiger mosquito (ATM). The study contributes to the literature by applying a stated preference method to estimate the public’s WTP to reduce the risk of an ATM invasion, expressed as a change in probability. It is the first ex ante invasive species analysis to test over two discrete invasion reduction probabilities based on management effort. Further, to overcome the challenges in valuing changes in probabilities, the study presented respondents with a well-defined discrete difference in the final probability, with one scenario reducing risk from 50 to 25% and the other from 50 to 5%. We find a significant difference in the mean WTP values between these two scenarios (A$67 vs. A$90). The overall conclusion is that estimated benefits of reducing the probability of an ATM incursion outweigh the costs.     

DIRECTED SEARCH ON THE JOB AND THE WAGE LADDER*

We model a labor market where employed workers search on the job and firms direct workers' search using wage offers and employment probabilities. Applicants observe all offers and face a trade‐off between wage and employment probability. There is wage dispersion among workers, even though all workers and jobs are homogeneous. Equilibrium wages form a ladder, as workers optimally choose to climb the ladder one rung at a time. This is because low‐wage applicants are relatively more sensitive to employment probability than to wage and thus forgo the opportunity to apply for a high wage, with a lower chance of success.     

Market Size and the Survival of Foreign‐owned Firms*

We develop a general equilibrium model with heterogeneous firms and foreign direct investment cost uncertainty and investigate the survival of foreign‐owned firms. The survival probabilities of foreign‐owned firms depend on firm‐level characteristics, such as productivity, and host country characteristics, such as market size. We show that a foreign‐owned firm will be less likely to be shut down when its parent firm's productivity is higher and its indigenous competitors are less productive. Although a larger market size will always reduce the survival probability of indigenous firms, it can lead to a higher survival probability for foreign‐owned firms if their parent firms are sufficiently productive.     

Negative price spikes at power markets: the role of energy policy

In Germany, substantial drops in wholesale power prices have become a regular phenomenon. While such price drops have far-reaching implications for the functioning of the power market, their underlying determinants remain poorly understood. To fill this gap, we propose a Markov regime-switching model to investigate low-price events at the European Power Exchange. Our analysis focuses on the role of energy policies that promote renewable energies and have led to significant reductions of nuclear capacities after the Fukushima accident. We find that high electricity infeed from renewable sources increases negative price spike probabilities, while the decommissioning of nuclear plants under the Nuclear Moratorium had an opposing effect. Simulations of market outcomes under different energy policies indicate that reaching ambitious renewable energy targets increases the frequency of low-price events and compromises the financial viability of conventional generation units, while a nuclear phase-out or an increase in storage capacities mitigates these effects.     

Evaluating currency crises: A Bayesian Markov switching approach

In this paper we examine the nature of a currency crisis. We do so by employing an out-of-sample forecasting exercise to analyse the Mexican crisis in 1994. Forecast evaluation was based on modern econometric techniques concerning the shape of forecaster’s loss function. We also extend the empirical framework suggested by Jeanne and Masson [Jeanne, O., Masson, P., 2000. Currency crises and Markov-switching regimes. Journal of International Economics 50, 327–350] to test for the hypothesis that the currency crisis was driven by sunspots. To this end we contribute to the existing literature by comparing Markov regime switching model with a time-varying transition probabilities with two alternative models. The first is a Markov regime switching model with constant transition probabilities. The second is a linear benchmark model. Empirical results show that the proxy for the probability of devaluation is an important factor explaining the nature of currency crisis. More concretely, when the expectation market pressure was used as a proxy of probability of devaluation, forecast evaluation supports the view that currency crisis was driven by market expectation unrelated to fundamentals. Alternatively, when interest rate differential is used as a proxy for probability of devaluation, currency crisis was due to predictable deterioration of fundamentals.     

On The Allocative Effects of Rent Seeking

We consider the effects of rent-seeking activities on resource allocation. Before rent-seeking activities take place, there are prior probabilities that an object will be given to one of several agents. The posterior probability depends on prior probabilities and the expenses incurred by all agents. In the case of two agents who equally value the object, prior and posterior probabilities coincide, and thus rent seeking has no effect on resource allocation. If there are two agents with different valuations of the object or we have more than two agents, rent seeking matters and posterior probabilities reflect the valuations of the agents.     

Underestimation of probabilities modifications: characterization and economic implications

The aim of this paper is to propose a behavioral characterization of individuals who underestimate probabilities modifications and to characterize this behavior in the standard preferences representation models under risk (expected utility, dual theory, rank dependent utility theory and MaxMin expected utility). Our main results are the following. Underreaction to probabilities modifications is in general independent from standard risk aversion and prudence. In models involving probabilities transformation functions, it is characterized by the slope of the probability transformation function. In the MaxMin expected utility model under risk, it is related to the weights of the maximal and minimal consequences in the preferences representation function. Considering a simple prevention decision, consisting in the reduction in the probability of a monetary loss, we show that individuals who underreact to probabilities modifications, invest less in prevention than individuals who objectively evaluate these modifications. Underreaction to probabilities modification is thus a possible explanation for low investment in prevention.     

Ex ante valuation of atmospheric visibility

In a world incomplete markets for environmental goods, ex ante planned expenditures rather than ex post realized outcomes explain the values which individuals attach to these goods. We use the distance function to develop restrictions from a model of ex ante consumer behaviour involving these goods. A Contigent valuation approach is then employed to estimate policy-relavant components of the ex ante economic values that recreationists attach to differing subjective probabilities of alternative atmospheric visibility levels at a wilderness location and at an urban location in Oregon. Marginal valuations of probability changes are similar at the two sites. Marginal rates of time preference for resolving uncertainities vary between 10 and 50% and are inversely related to education. Existence value averages 10% of total value, and evidence is mixed that site-specific value act as surrogates for general environmental preferences.     

Competitive equilibrium in the credit market under asymmetric information

We study a competitive credit market equilibrium in which all agents are risk neutral and lenders a priori unaware of borrowers' default probabilities. Admissible credit contracts are characterized by the credit granting probability, the loan quantity, the loan interest rate and the collateral required. The principal result is that in equilibrium lower risk borrowers pay higher interest rates than higher risk borrowers; moreover, the lower risk borrowers get more credit in equilibrium than they would with full information. No credit is rationed and collateral requirements are higher for the lower risk borrowers.     

Are experts better than potential users in predicting the uptake of an innovation? Extending the use of the Juster Scale

Are experts or potential users better at predicting the success of a new product? To explore this question we used an eleven-point probability scale, the Juster Scale, to ask various groups of people about their probability of taking up a new product and also their assessment of its chance of its success in the marketplace. Although this type of scale generally performs better than intention scales it tends to over-predict when used in a repertoire market and we examine its performance for a boundary condition of such a market. We also explored the use of the scale as a projective research tool which is a novel application. In this study the product was a new type of charity lottery. The study was undertaken in the month prior to the lottery closing and we subsequently knew the actual outcome. The Juster Scale generally performed poorly as a predictor in this context. The predictions from the experts were no more accurate than those of the general public but none had direct knowledge of an equivalent lottery. This exploratory study concluded that the actual behaviour of a sample of relevant consumers, where the product is available, is better for forecasting than asking for estimates of their potential behaviour, that is, behaviour predicts behaviour better than probabilities of behaviour.     

An ordinal characterization of the linear opinion pool

Given a collection of individual ordinal probabilities on a finite state space, we discuss an ordinal condition that is necessary and sufficient for an ordinal probability to be represented as a weighted average of probability representations of the individual probabilities. We also give necessary and sufficient conditions for when such an ordinal probability can be represented as an unweighted average of probability representations. Many thanks are due to an anonymous referee, who provided detailed comments and corrections which greatly improved this paper.     

银行监管中的最优市场约束研究

基于社会利润最大化的视角,本文研究了银行监管中的最优市场约束问题.研究发现:在银行监管中实施最优的市场约束不仅可以提高银行监管帕累托效率,而且可以给社会带来最大的利润;最优市场约束水平受到银行"额外价值",无市场约束时贷款失败的概率、贷款成功的收益、市场约束的成本弹性等因素的影响,且与这些因素呈正相关;最优市场约束水平对银行"额外价值"、贷款成功的收益这两个因素的变化敏感性较强,对无市场约束时贷款失败的概率的变化敏感性较弱,对市场约束的成本弹性的敏感性呈现出由强变弱的趋势.     

An analysis of credit terms in the eurodollar market

A model is presented incorporating various elements involved in the determination of theinterest rate in a capital market that is not purely competitive. It yields an equilibrium relation between the interest rate and the probability of default such that higher probability implies higher interest. Other factors affecting the rate of interest are the elasticity of demand, the perceived rate of loss related to default, and an extra premium due to risk aversion. The equilibrium relation is used as an econometric model which, under appropriate specifications, generates estimates of the weights attached to subjective risk indicators. The data cover transactions in the Eurocurrency market and deal only with publicly guaranteed loans to developing countries. Several economic indicators are identified as significantly affecting the subjective probability. These can be used to generate estimates of the subjective probabilities themselves.     

Contagion, Monsoons, and Domestic Turmoil in Indonesia's Currency Crisis

The paper investigates whether Indonesia's recent currency crisis was due to domestic fundamentals, common external shocks ("monsoons"), or contagion from neighboring countries. Markov switching models attribute speculative pressure on Indonesia's currency to domestic political and financial factors and contagion from speculative pressures in Thailand and Korea. In particular, the results from a time-varying transition probability Markov switching model (which overcomes some drawbacks of previous methods) show that inclusion of exchange rate pressures from Thailand and Korea in the transition probabilities improves the conditional probabilities of crisis in Indonesia. The paper also finds evidence of contagion in the stock market.     

Does technological innovation undertaken alone have a real pivotal role? Product and marketing innovation in manufacturing firms

This paper investigates the role of non-technological innovation on firms' innovation propensity and performance. We note that emphasis on technological innovation alone is misleading, as a firm's decision to undertake technological innovation brings about a more complex and general process which may involve new attitudes regarding organization and market orientation. We analyse the relationship between product and marketing innovation in manufacturing, focusing specifically on the food industry. We propose a bivariate probit model in which product and marketing innovation are estimated taking into account their reciprocal interactions. This enables us to provide more efficient and realistic estimates of a firm's probability of introducing either a new or improved product or a new marketing technique. In addition, the proposed model provides the determinants of such probabilities.     

Testing for the Presence of Moral Hazard Using the Regulatory Reform in the Car Insurance Market: Case of Korea

The aim of this paper is to investigate the presence of the moral hazard phenomenon in the Korean car insurance market. In the context of natural experiment, I examine whether the regulatory reform introduced in 2000 generates significant difference in accident probability between before and after the reform. Further, I analyse the different effects of regulatory reform on different parts of the outcome distribution. In any case, I do not find the significant effects of regulatory reform on accident probability.     

STOCK MARKET CRASH AND EXPECTATIONS OF AMERICAN HOUSEHOLDS

This paper utilizes data on subjective probabilities to study the impact of the stock market crash of 2008 on households' expectations about the returns on the stock market index. We use data from the Health and Retirement Study that was fielded in February 2008 through February 2009. The effect of the crash is identified from the date of the interview, which is shown to be exogenous to previous stock market expectations. We estimate the effect of the crash on the population average of expected returns, the population average of the uncertainty about returns (subjective standard deviation), and the cross-sectional heterogeneity in expected returns (disagreement). We show estimates from simple reduced-form regressions on probability answers as well as from a more structural model that focuses on the parameters of interest and separates survey noise from relevant heterogeneity. We find a temporary increase in the population average of expectations and uncertainty right after the crash. The effect on cross-sectional heterogeneity is more significant and longer lasting, which implies substantial long-term increase in disagreement. The increase in disagreement is larger among the stockholders, the more informed, and those with higher cognitive capacity, and disagreement co-moves with trading volume and volatility in the market.