A group of shoe manufacturers in the United State, Japan, Germany, and England have pooled resources to gain a larger market. What is this arrangement called?

http://www.legal-dictionary.thefreedictionary.com/Business+Trust

The arrangement that you are referring to is called a "strategic alliance" or a "joint venture." This is a cooperative agreement between two or more companies or organizations, where they combine their resources, skills, and expertise to achieve a common goal. In this case, the shoe manufacturers from the United States, Japan, Germany, and England have come together to expand their market share by leveraging their collective resources and strengths. Strategic alliances often help companies enter new markets, share distribution networks, lower costs, and access new technologies or expertise.