Aecom Technology Corp. said Wednesday that it has agreed to acquire Economics Research Associates of Los Angeles for undisclosed terms.

Economics Research is an international consulting firm concentrating on economic analysis for clients in entertainment, real estate, public facilities, tourism and economic development. The acquisition is a move to add to Aecom’s offerings, the Los Angeles-based provider of management and technical support services said in a statement.

This is the third acquisition for Aecom in the past four months. In August, Aecom acquired wastewater management firm KMK Consulting Ltd. and in October acquired environmental science consulting firm Gartner Lee Limited. Financial terms of either deal were not released. Both firms are based in Canada.

Shares in Aecom were up 8 cents to $29.92 in afternoon trading Wednesday on the New York Stock Exchange.