Spurious rejections of the standard Dickey-Fuller (DF) test caused by a single variance break have been reported and some solutions to correct the problem have been proposed in the literature. Kim et al. (2002) put forward a correctly-sized unit root test robust to a single variance break,...

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...

We analyze the well-known issue of economic growth convergence using quantile regres- sion. Most previous studies have used a least squares (LS) method or variation, which focuses on the issue only at the mean of the growth rate. Therefore, such results cannot provide a satisfactory answer to...

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 this paper we develop a test to detect the presence of endogeneity in conditional quantile models. The proposed test is a Hausman-type test in that it is based on the distance between two estimators in which one is consistent only under no endogeneity while the other estimator is consistent...

How the price of food is determined has become a critical issue, given the drastic surges in prices in recent years and the prevailing expectation of further increases. Along this line, this paper examines the sources of food price fluctuations in 11 developing Asian countries. The working model...

We develop a heterogeneous-agent general equilibrium model that incorporates both intensive and extensive margins of labor supply. A nonconvexity in the mapping between time devoted to work and labor services distinguishes between extensive and intensive margins. We consider calibrated versions...

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...

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...

This paper investigates whether fixed and mobile broadband services are substitutes or complements using firm-level panel data obtained from three major telecommunications operators in South Korea. We employ a multi-level demand model based on Hausman et al. (1994), which allow for the...