Journal of Economic Theory and Econometrics: Journal of the Korean Econometric Society

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Journal of Economic Theory and Econometrics
Journal of the Korean Econometric Society

Volume 22, Issue 3 (September 2011)

Stock Market Reaction to Oil Price Shocks: A Comparison between an Oil-exporting Economy and an Oil-importing Economy, Pages 1–29

Hansol Jung, Cheolbeom Park

Abstract | PDF (561 kilobytes)

In this study, we assess the responses of aggregate stock returns and their volatility in the face of oil price shocks in the Norwegian and Korean markets. Both Norway and Korea are small open economies; the former exports oil, and the latter imports it. We determine herein that the responses of aggregate stock returns and volatility differ substantially, depending on the underlying cause of the oil price rise and depending on whether an economy exports or imports oil. Additionally, a larger portion of stock return variations in small open economies can be explained by the world crude oil market as opposed to the US market; this implies that the small open economies have more oil-dependent technology and limited access to the global financial market. Finally, the results of our analysis of the conditional covariance measure indicate that the responses of stock returns and volatility are not based on a risk-return tradeoff relationship.

Economic Analysis of FRAND Commitment, Pages 30–61

Illtae Ahn, Kiho Yoon

Abstract | PDF (1125 kilobytes)

This paper provides an economic analysis of reasonable royalty rates when the patents are selected by a standard-setting organizations (SSOs). Based on the ex-ante auction model proposed by Swanson and Baumol (2005) for determining reasonable rates for FRAND (fair, reasonable and nondiscriminatory) commitment, this paper analyzes and compares the equilibrium outcomes when the SSO selects a standard by profit criterion and by social welfare criterion. It is shown that the social welfare may be lower when the patents are selected to maximize the social welfare rather than to maximize the profits. This paper deals with the case when the upstream patent holders are independent as well as the case when they are vertically integrated with the downstream firms.

Digital Convergence and Conglomerate Mergers, Pages 62–85

Chongmin Kim, In Ho Lee

Abstract | PDF (744 kilobytes)

We develop a formal model to deal with bundling in complementary markets. We develop the antitrust analysis of a merger between potentially complementary product producing firms when the merged firm might engage in bundling such as the proposed GE/Honeywell merger. Our model can be applied to the analysis of economic consequences of digital convergence. We show that the new multi-functional product as an outcome of digital convergence of two different products does not necessarily enhance competition in markets.

The Role of Money in the Dynamic IS Model, Pages 86–103

Dong Heon Kim, Yoon Sang Lim

Abstract | PDF (875 kilobytes)

As recently industrialized central banks conducted interest rate targeting, the usefulness of information of monetary aggregates for real economy has been discussed actively with focusing on the role of money in the IS model. This paper examines using Korean quarterly data of 1991:Q1-2010:Q2 the role of money in the backwardlooking and forward-looking dynamic IS models. The money is not statistically significant in both IS models while the real interest rate is. However, in the subsample analysis where the sample is divided into pre- and post-Korea financial crisis to incorporate the possibility of structural break around Korea financial crisis, the money seems to have played an important role in the pre-crisis period whereas the money appears not to have been statistically significant in the post-crisis period but the real interest rate has been statistically significant in the post-crisis period. These results imply that the money provided important information for the IS model before the inflation targeting but since the inflation targeting in 1998, the Bank of Korea targets interest rate explicitly and thus, the usefulness of monetary aggregates in the IS model seems to disappear as monetary aggregates are determined endogenously.


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