On exact D-optimal designs with 2 two-level factors and n autocorrelated observations

In this paper we consider the exact D-optimal designs for estimation of the unknown parameters in the two factors, each at only two-level, main effects model with autocorrelated errors. The vector of the n random errors in the observed responses is assumed to follow a first-order autoregressive model (AR(1)). The exact D-optimal designs seek the optimal combinations of the design levels as well as the optimal run orders, so that the determinant of the information matrix of BLUEs for the unknown parameters is maximized. Bora-Senta and Moyssiadis (1999) gave some conjectures about the exact D-optimal designs based on their experience of several exhaustive searches. In this paper their conjectures are partially proved to be true.Received: January 2003 / Accepted: October 2003Partially supported by the National Science Council of Taiwan, R.O.C. under grant NSC 91-2115-M-008-013.Supported in part by the National Science Council of Taiwan, R.O.C. under grant NSC 89-2118-M-110-003.     

外商投资与中国经济发展──产业和区域分析证据

本文将有关外商直接投资影响的分析 ,与中国经济的特定发展模式联系起来 ,从中得出两项分析结果。一是在产业发展层面 ,外商投资确实有助于改进资源配置效率 ,然而这种贡献却是以妨碍生产效率改进为代价的 ;二是在区域发展层面 ,以进口替代加资本深化为特征的“上海模式” ,在促进地区和全国经济发展方面 ,确实优于以出口导向加劳动密集为特征的“广东模式” ,只是前一模式本身存在着严重的可持续性问题     

Bounds analysis of competing risks: a non-parametric evaluation of the effect of unemployment benefits on migration

By reexamining the effect of unemployment benefits on reemployment probabilities we make two contributions to the literature: first, we estimate separate effects for reemployment in the local or a distant region. Second, we address the problem of incomplete duration within a competing risks model. Our results confirm that missing data problems at first preclude any meaningful result even though we have access to daily individual data on 50 % of the male workforce in Germany. When we impose additional assumptions, we obtain evidence that the treatment effect depends on the household context, the treatment intensity and the destination state.     

Lucky lots and unlucky investors

Review of Quantitative Finance and Accounting - The number 8 is considered lucky under the Chinese culture. This paper tries to examine whether investors hold such superstitious belief in the Hong...     

用于高频的新颖开关电容积分器

本文研究了用于开关电容(SC)滤波器的离散积分器,所推荐的积分器是由无耗离散积分器(LDI)和双线性离散积分器的最佳线性结合而成,因此,称之为组合离散积分器(CDI)。由于这个积分器使正常转折频率增加一倍,并使高频离散积分器误差减少到最低限度,所以它对高频应用是理想的。文中给出了组合离散积分器的几种SC实现,并且还给出了以组合离散积分器为基础,模拟一般一阶和二阶的模拟滤波器单元的SC电路。     

Rural tourism quality of services: fundamental contributive factors from tourists’ perceptions

Despite the importance of quality of services in the rural tourism sector, it is somewhat surprising that little study has been done to delve into the fundamental contributive factors that contribute to quality of services from the tourists’ perceptions. This is the first known study undertaken with a view to understand the fundamental contributive factors (i.e. climate change, carrying capacity, relaxation environment, and community support) from the environmental perspectives that link with quality of services in rural tourism destinations. A total of 400 questionnaires were distributed to the tourists who visited four study sites from Borneo Heights, Sarawak, and 215 were returned and used for analysis. To assess the developed model, SmartPLS 2.0 (M3) is applied based on path modelling and then bootstrapping. Interestingly, the findings revealed that tourists are more concerned about the changing of climate and relaxation environment at the destination. They also agreed that community support plays a significant role in the development of quality of services in the rural tourism. This study further discussed on the implications of the findings, limitations, and directions for future research.     

Would a North-South Free Trade Agreement Hurt Unskilled Labor in the North?

I present a simple model to examine the impact of international outsourcing on the welfare of skilled and unskilled labor. In this model, specialized business services are to facilitate manufacturing production, creating additional welfare gains in the presence of positive production externalities. Policies that favor the business service sector contribute to the development of a larger bundle of specialized business services, generating more welfare gains to not only skilled but also unskilled labor. Thus, a country’s unskilled labor is not necessarily worse off with open trade if the country is prosperous in business service provisions.     

Nonlinearities in the real exchange rates: new evidence from developed and developing countries

This paper investigates nonlinearities in the dynamics of real exchange rates. We use Monte Carlo simulations to establish the size properties of the Teräsvirta-Anderson test, when the dynamics of the real exchange rate is influenced by an exogenous process. In addition, we show that a modified nonlinearity test, which includes additional right-hand-side variables, performs much better than the original in both Monte Carlo exercises and in the actual data on 1431 bilateral real exchange rate series. Finally, we investigate the dynamics of the real exchange rate for both developed and developing countries using the modified test for the recent floating period. In general, the results find a greater incidence of nonlinear dynamics for developing country real exchange rates.