Yoslan Nur The development of Batam - an Indonesian island covering an area of 415 km2, located at 20 km Southeast of Singapore - started in the early 1970's. The aim was to compete with Singapore as the economic capital of the Southeast Asian region. But at the end of the 1980's, Batam's economic development was integrated with Singapore's in the economic cooperation of the Growth Triangle of Singapore, Johor et Riau (known as "Sijori"). The goal of this cooperation is to promote regional economic development through transborder cooperation. The integration of Batam in the Growth Triangle of Sijori is a very efficient means to promote the island's development through : the increase of private investment, the creation of jobs in industry, tourism and services sectors. The island has also experienced a rapid increase in : gross regional product (GRP), the value of exports, the number of tourists and migrants. Singapore became the first foreign investor in Batam. This situation has made Batam dependent on Singapore for : sources of capital, supply of assembly parts for the manufacturing industry, export of industrial products and marketing of Batam tourist industry.