Linear programing models for portfolio optimization using a benchmark

We consider the problem of constructing a perturbed portfolio by utilizing a benchmark portfolio. We propose two computationally efficient portfolio optimization models, the mean-absolute deviation risk and the Dantzig-type, which can be solved using linear programing. These portfolio models push the existing benchmark toward the efficient frontier through sparse and stable asset selection. We implement these models on two benchmarks, a market index and the equally-weighted portfolio. We carry out an extensive out-of-sample analysis with 11 empirical datasets and simulated data. The proposed portfolios outperform the benchmark portfolio in various performance measures, including the mean return and Sharpe ratio.     

Patterns and strategies of Foreign Direct Investment: the case of Japanese firms

This paper is to study globalization motives and strategies of Japanese manufacturing industries by analyzing the causes and patterns of foreign direct investment (FDI) of Japanese manufacturing firms. We use regression analysis to determine internally driving-out factors and externally-inducing factors. Japanese FDI strategy has gone through three different stages; from natural resource-seeking investment in the 1950s and 1960s to market-expansion investment in the 1970s and 1980s and to a combination of cost-reducing (low-cost labor-seeking) investment and market-penetrating investment in the 1990s. Our findings show that Japanese FDI in Asia and other developing countries tends to be in labor-intensive sectors where Japanese firms are losing their comparative advantages at home. The main motive for FDI into these regions is low-cost resource seeking. On the other hand, Japanese FDI in the US and Europe tends to be knowledge-intensive sectors where Japanese firms attempt to internalize transaction and information costs by globalizing its production. The main motive for FDI into these regions is market-seeking.     

International trade of GMO-related agricultural products

This paper examines the international trade of a variety of genetically modified (GM) food products over a 27-year period (1984–2011) with data from the United Nations using the tools of social network analysis. The results indicate that each of the different crops have a distinctive pattern of trade that has changed over time due to a number of different factors. Also, trade in agricultural commodities became more diversified over time, dominated less by the United States and other nations central in the trade networks and trade in the individual GM crops was stable over time. Countries maintained their trading partners for specific crops, despite the adoption of the genetically modified varieties. The economic implications of these results are discussed for specific countries.     

Credit Rating and Monetary Policy Transmission to Equity Markets: Evidence from the Emerging Market

This study empirically estimates credit channel of the monetary policy and corporate stock return using daily stock return data including the sample with non-financial firms listed in Korea stock exchange (KOSPI). Empirical results support that changes in the basis rate turn out to increase equity returns in case of the firms with higher credit rating compared to the previous year. The estimation results confirm the conjecture that monetary policy has a significant impact on stock market through the channel of changes in credit rating.     

Measuring living standards from the lowest: Height of the male Hangryu deceased in colonial Korea

The living standards in Korea during the colonial period (1910–1945) have been debated for a long time. We explored this problem using the height of the Hangryu deceased, a dead person who did not have any acquaintances to claim the body. We found that the height of male Hangryu deceased, ages 25 to 30, increased by 2.2 cm during the colonial period. This result is consistent with recent quantitative studies measuring income levels or demographic information. However, questions such as when this growth in height started and what initiated this pattern need further investigation.     

Bankers on the Board,Market Competition,and Conflicts of Interest

Abstract

Bankers on the board are expected to act as a fund-raiser and to help lowering financial costs, but they can impose conflicts of interest between shareholders and creditors. We empirically analyse the impact of banker-directors on corporate leverage and investment, using Korean firm data during the period from 2000 to 2012. Bankers on the board turn out to play different roles depending on market competition and macroeconomic circumstance. In less competitive industries where banks are less concerned about financial distress as a creditor, the presence of bankers on the board has higher leverage and more active investment, which can align with the interest of shareholders. However, in more competitive environment where firms are more concerned about financial distress and external financing, bankers on the board do not always increase leverage and investment, which can be divergent from the interest of shareholders.     

Resource abundance and economic growth in China

This paper revisits the resource curse phenomenon in China and differs from the previous studies in four respects: (i) City-level data is used; (ii) A spatial variable is constructed to estimate the diffusion effect of natural resources among cities in the same province; (iii) The impact of resource abundance on economic development is investigated not only at the city level but also at the prefectural level in China; (iv) We use a functional coefficient regression model to deal with city-specific heterogeneity and, at the same time, analyze the transmission mechanism of the resource curse phenomenon. Our empirical results show that there is no significant evidence to support the existence of a resource curse phenomenon in China. On the other hand, we find that the degree of natural resource abundance in a city has a positive diffusion effect on the economic growth of neighboring cities within the same province at the city level, but not at prefectural levels. We attribute this to the urban bias policy.