While the criteria for assessing labor force during site selection projects almost always include availability, skill sets, and wages, another aspect of workforce that is often considered is unionization. For some companies, the union climate of an area is an important factor in their site selection decision. Union data is available in the public realm, but there are challenges with the functional application of the data. In this installment of Insights, Reid Schultz shares the history of unionization in the United States and provides guidance on the assessing union climate in locations under consideration.