In this study, we estimate the public sector wage premium in a post-transition economy, a quarter of a century since the collapse of the old regime. Our methodology uses a copula method to estimate the switching regression model, which allows for the relaxation of the restrictive assumption of joint normality. We control for employment selection into both sectors using an instrument based on information regarding learned professions. We use data from the Polish Survey of Earnings by Occupations (2012). Contrary to earlier results for Poland, we found positive selection into employment in both sectors, with positive ATET and negative ATEU. The results suggest that both private and public sector employees select themselves into the sector in which they earn more than they would in a counterfactual scenario.

中文翻译：

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转型后经济中的公私工资差异

在这项研究中，我们估计了旧政权倒台以来四分之一世纪后过渡经济中公共部门的工资溢价。我们的方法使用copula方法来估计转换回归模型，这可以放宽关节正态性的限制性假设。我们使用基于有关已学专业的信息的工具来控制两个行业的就业选择。我们使用的是“波兰职业收入调查”（2012）中的数据。与波兰先前的结果相反，我们发现两个部门的就业积极选择，ATET为正，ATEU为负。结果表明，私营部门和公共部门的雇员都将自己选入自己的部门，他们所赚取的收入要比实际情况下要多。