Data Competitive exit or decline

This dataset contains a longitudinal firm-level panel of Türkiye’s largest industrial enterprises, covering the ISO 500 and Second 500 rankings for 1993–2024. It includes annual information on firms’ ranking, sales, value added, equity, assets, profitability, exports, employment, industry classification, and capital ownership structure. The dataset is designed for analyzing firms’ competitive position, decline, and exit from the ISO 1000.