Continuous-time mean-variance portfolio optimization in a jump-diffusion market

In this paper, we take up an approach of (Lindberg, in Bernoulli, 15(2):464–474, 2009) who introduced a new parameterization of the Black–Scholes model that allows for an easy solution of the continuous-time Markowitz mean-variance problem. We generalize the results of (Lindberg, in Bernoulli, 15(2):464–474, 2009) to a jump-diffusion market setting and slightly correct the proof and the assertion of the main result. Further, we demonstrate the implications of the Lindberg parameterization for the stock price drift vector in different market settings, analyse the dependence of the optimal portfolio from jump and diffusion risk and finally indicate how to use the method. We particularly also show how the optimal strategy can be obtained with the restricted use of historical data.     

Food price increases and net food importing countries: lessons from the recent past

Recent increases in food and other commodity prices have highlighted concerns that many poor countries are net food importers and higher food prices would worsen their trade balances. In this article, we analyze the changes in food trade balances associated with the 32% increase in food prices from 2000/2001 to 2004/2005. We find a small deterioration in food trade balances of low‐income countries and an improvement in middle‐income countries. The deterioration is most severe for countries in conflict and small island states, so attention should be placed first on these countries and on a few very‐low‐income countries that are also vulnerable. Because low‐income countries as a group had much lower agricultural GDP growth rates than middle‐income countries, the answers to food vulnerability in low‐income countries should probably be addressed within the context of incentives for agricultural production.     

The interest rate–inflation relationship under an inflation targeting regime: The case of Turkey

This paper examines the relationship between nominal interest rates and the expected inflation rate for the Turkish economy between 2002 and 2009, a period when the inflation-targeting regime was implemented as monetary policy. We use the test of cointegrating rank with a trend-break (a method introduced by Inoue, 1999) and we also apply exogeneity tests. Empirical findings indicate that monetary policy rates depend on inflationary expectations; long-term interest rates are affected by monetary policy; and the weak form of the Fisher effect is valid. This evidence implies that monetary policy has actually influenced the real long-term interest rates; the inflation targeting regime pursued by the Central Bank of Turkey is reliable; and hence realized inflation has remained close to its targeted level.     

提高客户满意度是否会增加企业盈利

大多数研究者和企业管理人员都认为客户满意度和企业期望的经营结果成正相关。研究发现,客户满意对购买意愿具有可测量的影响,而且对于客户保持和企业的经营业绩也有同样的影响。同时,有关研究也认为,客户满意度与花费份额(SOW)、公司的营业收入也有正相关的关系。在一些不同行     

Exchange Rate Pass-Through in Vertically Related Markets

The paper provides a theoretical framework which addresses exchange rate pass-through within the setting of vertically related markets. In particular, foreign firms' price adjustment in response to an exchange rate shock is evaluated. This permits study of the importance of cost effects of the exchange rate shock. Recent empirical evidence indicated the relevance of these cost effects. It is shown that one can decompose the effects of an exchange rate shock on the final goods market into direct and indirect components. The indirect effect works through the input market. The degree of pass-through then depends on the relative importance of direct and indirect effects, which in turn depends on the nature of vertical structures and strategic firm behavior. It is shown that the institutional aspects of vertically related markets play a role in explaining incomplete price adjustments in both intermediate and final goods markets and the failure of PPP in the short run.     

Public–private wage differentials in Turkey: public policy or market dynamics?

We evaluate public–private sector wage differentials by gender in Turkey between the years 2005 and 2013. Using micro data from Household Labor Force Surveys we find a positive premium for low wage earners and a penalty of working in the public sector at the higher end of the distribution. Although the penalty has not disappeared, the price effect has increased at both ends of the distribution. The increase at the lower tail is attributed to a higher price effect in the public sector, whereas at the higher tail it has been a result of a relatively uneven wage increase in the private sector along the distribution, rather than an explicit public wage policy.     

Revisiting FDI-led growth hypothesis: the role of sector characteristics

Does foreign direct investment (FDI) lead to higher growth? What type of FDI really works? In this paper, we disaggregate FDIs based on their technological characteristics and investigate which kind of FDI leads to output growth. The results for the sample of OECD countries during the period 1985–2012 indicate that FDI inflows to Information and Communication Technologies (ICTs) using and producing manufacturing and service sectors (ICT-based), non-ICT using and producing manufacturing and service sectors (non-ICT-based) and other sectors (non-ICT-other) play no role in contributing to economic growth. However, we provide evidence that absorptive capacities of host countries work through ICT-based FDI inflows. Only if the host countries have sufficient level of human capital, financial resources and technological infrastructure, ICT-based FDI will foster economic growth. The results are robust to controlling missing values, studying the subsample of emerging market economies and consideration of endogeneity.     

An empirical investigation of US fiscal expenditures and macroeconomic outcomes

In addition to containing stable information to explain inflation, state-local expenditures also have a larger share of the forecast error variance of US inflation than the federal funds rate. Non-defense federal expenditures are useful in predicting real output variations and, starting from the early 1980s, also present a larger share of the forecast error variance of US real output than the federal funds rate.     

Testing the proposed “GuidePerf” scale for tourism: performances of tour guides in relation to various tour guiding diplomas

The satisfaction perceived from the performance of tour guides (TGs) affects tour operators and other services in the tourism industry. As the tour guiding performance becomes more crucial in service quality and tourist satisfaction, education also becomes a critical tool to enhance the tour guiding performance. Using semi-structured, face-to-face interviews with seven TGs in Cappadocia/Turkey and employing content analysis of the data, the Tour Guide Performance Scale (GuidePerf) was developed in this particular study. Reliability and validity of GuidePerf were supported by exploratory factor analysis and confirmatory factor analysis. The scale was composed of 18 items and three dimensions, namely: “personality and efficiency,” “presentableness,” and “proficiency.” Proceeding to the next step with the approval, the GuidePerf was conducted on the tour participants (TPs) who were guided by three different TG types in terms of the education they had received. The results revealed that there is significance when “presentableness,” and “proficiency” dimensions are considered.