Dynamic factor structure of team performances in Liga MX

Team performance of the Mexican Football League (Liga MX), measured as the percentage of the total points obtained during each short tournament, is analyzed using Dynamic Factor Models (DFMs). The estimation of the common components is carried out with Principal Components and the stochastic nature of the DFM is studied through Panel Analysis of Non-stationarity in Idiosyncratic and Common Components. The results reveal that there are two common factors, one being possibly non-stationary. These factors show an interesting dynamic behavior in the league and allow to split the teams into two groups, namely, top competitors and emerging or relegated teams. Some discussion is given in this direction.     

国内地区间价格水平差异收敛性再检验

由于以CPI与RPI构建的地区间相对价格水平均存在较严重的截面相关性,而类似文献所采用的第一代检验方法无法克服这一问题,故利用第二代检验方法对国内地区间相对价格水平差异的收敛性做了重新检验。结果表明：以CPI构建的地区间相对价格水平在本研究的大多数时间段内均不收敛,而以RPI构建的价格水平仅在部分时间段内趋于收敛,这与类似文献基于第一代检验方法得出的乐观结论形成了鲜明对比。按照地区特征对样本地区进行分组研究,发现相对价格水平倾向于在国内较富裕以及较开放的地区间收敛,而研究结果表明经济增长和通胀水平对地区间价格水平差异收敛性的影响并不确定。