完美货币与完美经济

没有完美的货币或者完美的经济组织形式。欧元和欧元区经济的问题,都是在全球化过程中所必须经历的阶段。一个好的经济体制,应该使＂国民生活水平＂最大化。但是,如果要具体到现实世界,＂生活水平最大化＂往往意味着很多,很可能意味着对其他经济体利益的侵蚀。本文从信用约束、经济一体化等角度,论述了欧元的使用对欧元区经济的益处;并指出了欧元使用带来的南欧国家财政赤字和贸易逆差问题。中国对外投资应该辩证地看待欧美经济体的长处和不足,合理配置外汇资产的比例。     

Foreign currency borrowing,exports and firm performance: evidence from a currency crisis

This paper develops a simple signaling model of foreign currency borrowing that yields predictions about firm survival and performance during a currency crisis. Using a large panel of firm level data for South Korea we offer empirical support for many of the predictions of our model, while others support predictions that cannot be tested using our data. Our paper demonstrates that although firms that borrow in foreign currency are more likely to exit after the currency collapses, those that continue to produce perform better. Among them, the best performers are exporters whose foreign sales are more competitively priced under a devalued currency.     

Secondary currency: An empirical analysis

Many cases exist of multiple currency usage throughout history. As two leading examples, secondary currencies were widespread during both the Great Depression in the United States and the 2002 recession in Argentina. What are the determinants of multiple currency usage and what is the effect on economic activity? Both issues are empirically addressed using individual-level surveys collected by the authors in Argentina during 2002 and 2003. The evidence supports the theoretically predicted determinants of secondary currency acceptability put forth in monetary theory. In particular, findings show that the acceptability of the secondary currency increases when the supply of national currency is low, the relative transaction cost of the secondary currency is low, and the individual trading technologies are less effective. Moreover the acceptability of the secondary currency has real effects on economic activity. Among those who use the secondary currency the monthly income gain is more than 15% of the average Argentine's monthly income. Excluding trades of used goods, this amounts to a 0.6% increase in GDP.     

Convenient prices, currency, and nominal rigidity: Theory with evidence from newspaper prices

Certain items’ prices are often set to simplify and expedite transactions, by coinciding with available monetary units, requiring few pieces of money, or requiring little change. In this sense, these prices are more convenient than other proximate prices. This paper models a firm that explicitly incorporates convenience into its pricing decisions—where convenience is quantified by the number of currency units in a transaction—and illustrates the theoretical behaviors that can arise. Newspaper cover price data empirically support the theory. Across a broader range of goods and services, convenience appears to play a role in effecting above-average nominal price rigidity.     

A fundamental theory of exchange rates and direct currency trades

In this paper we construct a two-country search model to determine the nominal exchange rate between two fiat monies. Our model allows agents to use any currency to trade for goods in all countries. However, search frictions restrict agents’ opportunities for instantaneous arbitrage, and hence make the nominal exchange rate determinate. The nominal exchange rate depends on the two countries’ economic fundamentals, including the stocks and growth rates of the two monies. Direct exchanges between currencies are essential and they imply a nominal exchange rate that is different from the relative price between the two currencies in the goods markets. There are persistent violations of the law of one price and purchasing power parity in equilibrium, despite the fact that prices are perfectly flexible and all goods are tradeable between countries. Nominal and real exchange rates can move together in the steady state in response to money growth shocks.     

Cross-hedging foreign currency risk: Empirical evidence from an error correction model

In this article, the traditional price change hedge ratio estimation method is extended by applying the theory of cointegration in the case of cross-hedging of spot exchange risk of the Belgian franc (BF), the Italian lira (IL), and the Dutch guilder (NG) with U.S. Dollar Index futures contracts. Previous studies ignore the last period's equilibrium error and short-run deviations. The findings of this study indicate that the hedge ratio estimated by the error correction method is superior to that obtained from the traditional method, as evidenced by the likelihood ratio test and out-of-sample forecasts. Hedgers will be able to control the risk of their portfolios more effectively at a lower cost.     

Capital market imperfections and the theory of optimum currency areas

This paper studies how within- and cross-country capital market imperfections affect the welfare effects of forming a currency union. The analysis considers a bank-only world where intermediaries compete in Cournot fashion and monitoring and state verification are costly. The first part determines the credit market equilibrium and the optimal number of banks, prior to joining the union. The second part discusses the benefits from joining a currency union. A competition effect is identified and related to the added monitoring costs that banks may incur when operating outside their home country, through an argument akin to the Brander-Krugman “reciprocal dumping” model of bilateral trade. However, in our framework, whether joining a union raises welfare of the home country is ambiguous; it depends on the relative strength of “investment creation” and “intermediation diversion” effects.     

Determining global currency bloc equilibria: An empirical strategy based on estimates of anchor currency choice

The study presents an empirical strategy for determining global currency bloc equilibria. The procedure includes, first, a nested logit estimation of the combined determinants of currency regime and anchor currency choice; second, a test for a welfare-maximizing regime decision, in which estimates of the relative welfare of alternative regimes are inferred from the results of the first step estimation; and third, taking the path dependency of regime choice into account, a currency bloc equilibrium is derived. In equilibrium, the dollar bloc is somewhat smaller and the euro bloc larger than at present. Counterfactual exercises assess among others the potential for a renminbi bloc.     

Options and efficiency: Some experimental evidence

This paper examines the information aggregation role of options when agents possess diverse information about possible asset returns. We construct two identical experimental markets: one with and one without options. We find that options speed the information aggregation process. Asset markets that have parallel option markets aggregate traders' diverse information faster than markets where options trading is not available. Implied ranges were calculated from asset and option prices and compared to the actual ranges. These comparisons suggest that options may provide a means for agents to coordinate beliefs about asset values.     

An event study of institutions and currency crises

We use event study methodology to examine the behavior of seven institutional variables eighteen months prior to and after a currency crisis. Our data on institutions include bureaucratic quality, corruption, ethnic tensions, external conflict, internal conflict, government stability, and law and order over the period 1984-2002. Our country coverage includes forty industrial, emerging market, and developing economies for various regions of the world. The graphical event study shows that there are many instances where institutions are weaker in periods before and after a currency crisis than during tranquil periods. The evidence is most compelling for government stability, law and order, bureaucratic quality, and corruption. We also test for differences in the mean values of institutional variables in turbulent periods around a crisis event and tranquil, non-crisis periods. Results from our tests generally complement evidence from the event study.     

Auctions with selective entry and risk averse bidders: theory and evidence

We study auctions with selective entry and risk averse bidders. Our model accounts for risk averse bidders' endogenous participation decision and thus encompasses the existing entry models. We establish entry and bidding equilibrium in first‐price auction and ascending auction mechanisms and show that bidders' entry behavior differs between these two mechanisms with different forms of risk aversion. Our approach provides testable implications of risk aversion in terms of entry behavior. We analyze a timber auction data set and propose a simple test for the form of bidders' risk aversion based on our model implications.     

Exchange rate exposure, foreign involvement and currency hedging of firms: some Swedish evidence

This paper investigates the effect of exchange rate fluctuation on a firm's value, the so-called exchange rate exposure, for a sample of Swedish firms. In contrast to previous results, using U.S. data, the values of Swedish firms, as reflected in the stock price, seem quite sensitive to movements in the exchange rate. Studying the cross sectional differences in exposure, the estimated exposure is positively and significantly related to the fractional of total sales made abroad and negatively related to the use of currency derivatives.
F30, G10     

External currency market data: An application from BIS series

The Bank for International Settlements, in its Annual Report, has provided the most-used data source for statistical work by international financial researchers concerned with the Eurodollar market and with other external currency markets. Unfortunately, the often-confusing and complicated published series have been used indiscriminately. This paper develops an approach for identifying foreign private non-bank ownership of US dollars held in offshore markets. Explicit consideration of the types and strength of assumptions necessary makes evident the care that should be exercised in the use and interpretation of the various BIS data series.     

Rate of return parity and currency crises in experimental asset markets

This paper explores the impact of exchange rate uncertainty on the predictive power of rate of return parity in a laboratory environment, extending the work of Fisher and Kelly [Fisher, E.O., Kelly, F.S., 2000. Experimental foreign exchange markets. Pacific Economic Review 5, 365–388] and Childs and Mestelman [Childs, J., Mestelman, S., 2006. Rate of return parity in experimental asset markets. Review of International Economics 14, 331–347]. While these works use unchanging exchange rates, this paper allows for a change in the exchange rate between laboratory currencies. The data indicate rate of return parity is weakened by the potential for a currency crisis. The results also indicate that currency crises can be caused by self-fulfilling prophecies and that the level of reserves with which a fixed exchange rate is defended impacts the timing of a crisis but does not significantly change the likelihood of a currency crisis.     

A dynamic model of entrepreneurship with borrowing constraints: theory and evidence

Does wealth beget wealth and entrepreneurship, or is entrepreneurship mainly determined by an individual’s ability? A large literature studies the relationship between wealth and entry to entrepreneurship to inform this question. This paper shows that in a dynamic model, the existence of financial constraints to the creation of businesses implies a non-monotonic relationship between wealth and entry into entrepreneurship: the probability of becoming an entrepreneur as a function of wealth is increasing for low wealth levels—as predicted by standard static models—but it is decreasing for higher wealth levels. U.S. data are used to study the qualitative and quantitative predictions of the dynamic model. The welfare costs of borrowing constraints are found to be significant, around 6% of lifetime consumption, and are mainly due to undercapitalized entrepreneurs (intensive margin), rather than to able people not starting businesses (extensive margin).     

Decentralization of the firm: theory and evidence

Value maximization requires either that knowledge is transferred to those with the right to make decisions, or that decision rights are transferred to those who have the knowledge. A tradeoff of knowledge transfer costs and control costs is required. Characteristics of firms' investment opportunity sets (IOSs) that affect knowledge transfer costs and control costs are identified. Testable predictions about the relations between these characteristics and firms' decentralization decisions are developed and tested. The evidence presented is consistent with our predictions and is robust to different ways of measuring variables.     

Unconditional and conditional takeover offers: experimental evidence

This article compares the predictions of finite-shareholdermodels of conditional and unconditional takeover offers withthe outcomes of laboratory experiments. In addition to differentiatingbetween types of offers, the experimental designs span smalland large firms as well as different levels of offer premiums.It is found that in unconditional offers to large groups ofsubjects (28-40), the symmetric Nash equilibrium predicts observedtendering frequencies quite accurately. For other experimentaldesigns, the results are mixed. The analysis of shareholdertendering strategies from the experiment yields insights into(I) the effects of takeover offer designs, (ii) the appropriatenessof finite-shareholder models for research, and (iii) the costsof free riding when shareholders are nonatomistic.     

Power purchase agreements with incremental tariffs in local currency: An innovative green finance tool

Investment volume in green projects, specifically in the green electricity market, suffers from limitations such as inadequate long-term financing, various risks, and a low rate of return on investment. Renewable energy power purchase agreements (PPAs), as a direct legal contract between a power provider and a power buyer, are one of the most popular instruments to increase investment. In this study, we model an adjusted PPA in the local currency framework to lower exchange rate risk and incremental tariffs by having the government pay part of the spillover tax revenues to the PPA, leading to a higher return on investment. The major conclusion of this study is that the use of tax revenue through the spillover effect of green electricity supply is a suitable source of financing for PPAs. As one policy implication, we recommend that developing countries allocate 50% of the tax revenue originating from power supply and adopt incremental PPAs to encourage private investment in green projects.     

Dividend payout and executive compensation: theory and evidence

Bhattacharyya (2007 ) develops a model in which compensation contracts motivate high‐quality managers to retain and invest firm earnings, while low‐quality managers are motivated to distribute income to shareholders. In equilibrium, the model shows that there is a positive (negative) relationship between the earnings retention ratio (dividend payout ratio) and managerial compensation. Results of tests of US data show that executive compensation is positively (negatively) associated with earnings retention (dividend payout). Our results indicate that corporate dividend policy is perhaps best understood by considering the payout ratio (dividends divided by earnings), rather than the level of cash dividends alone.