The aim of this study was to identify common determinants of the shape of labour market institutions in the group of 25 post-socialist countries during the transition period. The exclusion of countries’ fixed effects (with the use of least squares dummy variable — LSDV model) showed that conducted market reforms (especially the privatisation of state-owned companies and enterprise restructuring) have determined the shape of labour market institutions in post-socialist countries. However, the levels of political liberty, protection of property rights, international trade freedom and government expenditures did not occur to have influenced the labour market institutions in these economies.