简易误码率测试装置的设计

利用GAL器件和单片机PIC16C74设计产生频率可变、输出电压可调的噪声、码元和传输速率可变的测试码，对被测系统进行误码率测试，输出测试的结果。     

我国宏观经济政策与经济波动的实证研究

本文根据Granger因果检验和联立方程模型，利用我国1985—2003年的年度统计数据，对我国宏观经济政策与经济波动之间的关系进行了实证分析。研究结果表明，消费政策、投资政策和外贸政策对经济波动影响的显著性水平要高于财政政策和货币政策对经济波动影响的显著性水平，影响我国经济波动的关键政策并不是财政政策和货币政策，而是消费政策、投资政策和外贸政策。     

Purchase process for capital equipment and services

This article develops some interactive dimensions of the industrial buying center. Buying group processes and outcomes were examined for purchases of capital equipment and industrial services in 31 firms. Qualitative as well as quantitative data were analyzed to test the soundness of an interactive communication perspective on buying, and the managerial implications to be drawn from such an analysis. Equipment and services purchase measures were found to differ reliably across several indices suggested by our theoretical orientation.     

An empirical note about additive outliers and nonstationarity in Latin-American inflation series

This note shows the empirical dangers of the presence of large additive outliers when testing for unit roots using standard unit root statistics. Using recent proposed procedures applied to four Latin-American inflation series, I show that the unit root hypothesis cannot be rejected.Jel classification: C2, C3, C5I want to thank Pierre Perron for useful comments on a preliminary version of this paper. Helpful comments from an anonymous referee, and Yiagadeesen Samy are appreciated. I thank the Editor Baldev Raj for useful comments about the final structure of this paper. Finally, I also thank André Lucas for helpful suggestions concerning the use of his nice computer program Robust Inference Plus Estimation (RIPE).First revision received: August 2001/Final revision received: December 2002     

Pacific Basin stock markets and international capital asset pricing

In this paper, we follow Harvey (1991) to investigate whether rates of return on Pacific Basin stock markets can be explained by conditional version of International Capital Asset Pricing Model (ICAPM), which allows for time-varying expected returns, variances, and covariances. The results show that most individual Pacific Basin markets can be described by the conditional ICAPM. However, the multiple markets' tests do not support the conditional ICAPM formulation, and the estimates of world reward to risk ratio are not the same across these markets. Furthermore, the Ghysels and Hall test (Ghysels & Hall, 1990a, 1990b) shows that the estimates of parameter are also unstable in the conditional ICAPM formulation. This implies that it is difficult to use world return to describe the relationship between expected return and risk for the Pacific Basin stock markets.     

Currency Crisis in Korea – When and Why It Happened

Two possible causes of the Korean financial crisis are examined: (1)deterioration of the macroeconomic indicators andinconsistent policies and (2) sudden shifts in the market expectation andconfidence. Although the truthseems to lie between these causes, we conclude that the Korean currency crisisresulted from aserious mismanagement of foreign exchange rates and foreign currency reservesas well as theaccumulation of short-term foreign debts. Although it is generally believedthat the exchange rate ofthe won started depreciating drastically on 8 November 1997, depreciationstarted three monthsearlier when the international market conditions put the pressure on the won.     

新疆对外贸易与经济增长研究——基于协整与Granger因果分析

GDP与对外贸易有一定的因果关系,对外贸易额是GDP变化的原因之一。改革开放以来,新疆经济快速发展。新疆对外贸易是推动经济增长的重要因素;对外贸易总量与经济发展总量同步;它们关系越来越密切,贸易的依存度提高;对外贸易结构的调整促进了新疆经济结构的发展。     

浮头式换热器的防腐与试压工艺

介绍了浮头换热器的优点和应用场合,验证了用细长管做喷头对换热器管束内表面进行喷砂处理、高科技防腐涂料的配制过程、对管束进行灌装涂漆的防腐工艺过程,介绍了浮头换热器的试压工艺流程,以及采用试压法兰对浮头管板进行试压的工装。     

我国货币政策与沪深股市的协整关系研究

运用协整检验、误差修正模型、格兰杰(GRANGER)因果检验等计量经济学方法,对我国货币政策如何影响沪深股市这一问题做了系统而深入的研究。通过分析,得出了如下结论:STV、M0、M1、M2之间存在着两个协整关系;RSTV、RM0、RM1、RM2之间存在着三个协整关系。在货币供应量与沪深股市市价总值之间,是货币供应量的变化影响沪深股市市价总值,而不是沪深股市市价总值影响货币供应量的变化。这些结论对投资者尤其是机构投资者来讲,具有一定的参考价值。同时,对我国货币政策当局调控股市也有一定的借鉴意义。