Productivity and profitability in the 500 largest firms of Turkey, 1980–94

The Istanbul Chamber of Industry (ISO) regularly conducts a survey among the largest industrial establishments in Turkey. Every year questionnaires are sent out to 4,000 establishments. The establishments are ranked according to sales from production. The data for the top 500 are published in September (or in special) issues of the Journal of the Istanbul Chamber of Industry. ¹