With the explosive growth of the internet and the change in consumer demand, post-PC is emerging as a substitute for the existing desktop PC and laptop PC. post-PC is a new computer which is portable with wireless networking, cheaper than the existing PC and specializing in the specific...

Recently increase of the waste agricultural film (WAF) raises the loss of the resources and produces the environmental damage in Korea. The Korean government has established the basic plan for increasing the recycling rate and abating the environmental damage. The objective of this paper is to...

Modelling household behaviour with the data from dichotomous choice contingent valuation (DCCV) surveys is often complicated by zero willingness to pay (WTP) responses in the sample. To deal with the zero responses, a two-equation model is considered, which incorporates a two-level decision...

This article attempts to analyse the determinants of firms' Research and Development (R&D) expenditures in Korea by considering the business environment after the economic crisis in 1997. In addition, to take into account zero R&D expenditure, this article employed a two-equation model unlike...