Regional and subregional economic cooperation and integration could help to overcome problems of market size, especially in landlocked developing countries, and attract the private sector to invest in infrastructure development.
区域和分区域的经济合作及一体化可有助于克服市场过小的问题（对于内陆发展中国家尤其如此），并吸引私营部门投资基础设施建设。