The rise of the machines: Capital imports and real manufacturing wages in 57 nations

Outward-oriented policy reform has attracted a large number of academics to the study of the trade-labour market nexus. One of these fields has focused on capital intensive (machinery) imports and its effect on manufacturing wages. The skill-enhancing-trade (SET) hypothesis was put forth to explain a potential relationship where an inflow of capital imports results in increased demand for skilled labour and decreased that of unskilled labour, and thus resulted in a rise in skilled wages and a decrease in their unskilled counterparts. This study revisits this hypothesis with a panel from the manufacturing sector of 57 nations. We improve upon previous studies in a number of ways. We add developed nations to the sample and examine capital imports from rich countries as well as the rest of the world. This takes into account the prominence of vertical production networks in international trade. We adhere closely to the neo-classical trade model and employ definitions of skilled and unskilled workers that capture the production process of particular items. Finally, we fit a robust dynamic panel data model that accounts for the endogeneity of the determinants of trade and wages. In this way we test whether the SET hypothesis is generally applicable as opposed to previous studies which use an ad hoc selection of countries and variables. We find that the SET hypothesis is not driving changes in manufacturing wages. Instead, worker productivity and GDP per capita explain these labour market outcomes.