Using the Korea Labor and Income Panel Study from 1998 to 2010, we measure income mobility and determinants of income ranks and mobility. Empirical outcomes reveal that income mobility is quite limited for both the poorest and the richest income group households. Moreover, a macro economic shock...

There is ample evidence that celebrity suicides may induce copycat suicides, with media coverage playing a critical role in mediating this relationship. This paper builds an economic model to explain this putative link based on the identity theory of Akerlof and Kranton (2000). The empirical...

The corporate leniency program has played an important role in detecting cartels that damages consumer welfare and competition. This study investigates the impacts of Korea¡¯s leniency revision in 2005 on cartel stability by using a Poisson regression. The estimation results show that the new...

This paper shows that firms producing homogeneous goods (e.g. Bertrand competitors) can achieve supernormal profits using interfirm bundled discounts, which connect their product with a specific brand of other firm with market power. By committing to a price discount exclusively to buyers of a...

In network industries, we often observe frequent upgrades of existing products as well as delayed introductions of new products. In order to explain these contrasting phenomena, this paper examines a durable-good monopolist's incentive for R&D in- vestment in new product development in a market...

It is well known that any statistic based on sample averages can be sensitive to outliers. Some examples are the conventional moments-based statistics such as the sample mean, the sample variance, or the sample covariance of a set of observations on two variables. Given that sample correlation...

Quantile regression (QR) models have been increasingly employed in many applied areas in economics. At the early stage, applications in the quantile regression literature have usually used cross-sectional data, but the recent development has seen an increase in the use of quantile regression in...

We provide a new characterization of the equality of two positive-definite matrices A and B, and we use this to propose several new computationally convenient statistical tests for the equality of two unknown positive-definite matrices. Our primary focus is on testing the information matrix...