产业升级、贸易政策与经济转型

产业升级是经济转型的内驱动力，贸易政策对于产业升级具有制约作用，是经济转型的外驱力量。政府通过设计合理的激励机制，将两种力量聚合，积极推动经济转型，从而缩短经济转型的时间进程。     

Asymmetric volatility in the foreign exchange markets

We examine the presence or absence of asymmetric volatility in the exchange rates of Australian dollar (AUD), Euro (EUR), British pound (GBP) and Japanese yen (JPY), all against US dollar. Our investigation is based on a variant of the heterogeneous autoregressive realized volatility model, using daily realized variance and return series from 1996 to 2004. We find that a depreciation against USD leads to significantly greater volatility than an appreciation for AUD and GBP, whereas the opposite is true for JPY. Relative to volatility on days following a positive one-standard-deviation return, volatility on days following a negative one-standard-deviation return is higher by 6.6% for AUD, 6.1% for GBP, and 21.2% for JPY. The realized volatility of EUR appears to be symmetric. These results are robust to the removal of jump component from realized volatility and the sub-samplings defined by structural-changes. The asymmetry in AUD, GBP and JPY appears to be embedded in the continuous component of realized volatility rather than the jump component.     

基于引力模型的中美农产品贸易边境效应研究

针对中美两国在农产品贸易上的新变化,应用引力模型的派生模型——边境效应引力模型对中美两国农产品贸易的流量和流向进行理论和实证研究。首先介绍了边境效应引力模型基本模型的推导过程,并引入了调整模型。然后采用1987至2005年其中5年的截面数据进行计算,结果发现:中美农产品贸易的边境效应显著存在,且呈逐年下降趋势;两国之间的农产品贸易边境效应存在流向和区域上的差异;距离的平方并不影响模型的可靠性。     

美国钢铁贸易保护争端及其对世界经济贸易的影响

美国钢铁保障措施的出台是经济衰退期外贸政策保护主义倾向进一步加强的具体表现。作为WTO成员，美国按国内法201条款实施的钢铁保障措施必须符合WTO保障措施规则。但美国钢铁保障措施即使符合WTO规则，也是通过损害其钢铁贸易伙伴正当利益来追求本国利益最大化。因此，在全球贸易体制约束下，美国的行为必然引起各相关方与美国之间运用全球贸易规则的利益博弈，并由此对世界经济贸易产生重大影响。     

钱包赌戏悖论及其行为的经济学意义

本文对行为经济学的一个重要微观模型———钱包赌戏悖论建立了认知分析框架 ,不仅彻底消解了该悖论 ,还发现了与效用和概率均无关的一种新的非理性效应。这一效应既可能导致无帕累托效率的交易陷阱 ,也可能与效用歧化和概率误判等已知的行为经济学效应协同作用 ,产生更复杂的非理性决策。     

From T-Bills to Stocks: Seasonal Anomalies Revisited

This paper employed eleven data series which consist of stocks, bonds, bills, equity premiums, term premiums, and various default premiums to investigate whether January seasonality reported in existing literature is robust across different states of the economy as this has important trading implications. For the periods 1926–1990, small stocks, small stock premiums, low grade bonds, and default premiums (spread between high grade, low grade and government bonds) reveal January seasonality and that the seasonality is robust across different states of the economy except for low grade bond returns and default premiums. January seasonality for low grade bond returns and low grade bond default premiums are primarily driven by results found during periods of economic expansion. Overall, January seasonality is more evident during the economic expansion periods although the magnitude of default premiums is larger during periods of economic contraction. Furthermore, prior findings of strong summer equity returns are primarily driven by the results found during the periods of economic contraction. It is also found that equity returns are generally higher during periods of economic expansion.     

贸易开放度与中国经济增长关系的地区差异研究

为了探求中国的开放政策是否促进了经济增长，以及开放政策对不同区域的作用是否存在差异，本文在相关文献回顾的基础上，运用中国大陆地区28个省、自治区和直辖市（海南、重庆、西藏除外）1984-2004年的相关数据，采用Panel Data模型对贸易开放度与中国经济增长的关系问题进行了实证研究。研究的结论认为开放的对外经济贸易政策促进了中国的经济增长；井且通过研究发现这一促进作用存在着地区差异，对于中西部地区来说，促进作用更大。     

城市规模、空间距离与城市经济吸引区——一个简单的经济地理模型

本文从经济运行的微观基础出发，构建了一个简单的经济地理模型，并以此为基础对城市经济吸引区的相关问题进行了初步的探讨，解释了由“引力法则”和断裂点理论推导出的两个经验性推论：一是两个相邻且规模相等的城市其经济吸引区分界线为二者连线的中垂线；二是对于两个相邻但规模不相等的城市，则小城市的经济吸引区可能处于大城市吸引区的包围（或部分包围）之中。