Union vs. Nonunion Wage Norm Shifts
探讨工资设定中工会与非工会部门工资规范的离散变化，指出近期工资规范下移主要影响工会部门，对理解工资动态和劳动力市场分割有参考价值。
Empirical investigations of wage determination have often produced autocorrelated residuals from time-series wage equations. Runs of overor underprediction have usually been regarded as weaknesses in specification to be corrected or explained away. In 1980, however, George Perry suggested that such runs represent an important, if neglected, characteristic of American wage setting. He argued that of wage change develop in the labor market. These norms, according to Perry, change discretely; there are periods of more or less wage pushiness. Aggregate wage indexes can be influenced, even if norm shifts are not fully reflected everywhere, providing those sectors that are affected have sufficient weight in the indexes. An obvious division in the labor market is between the union and nonunion sectors. There is reason to believe that while there has been a (downward) shift in wage norms recently, the impact has been concentrated in the union sector (see my 1985 article). Indeed, the union sector is probably inherently more prone to norm shifts than the nonunion.