This study tries to (1)to examine the difference of corporate social performance (CSP) between the old IPO firms and the new IPO firms. and (2)to investigate the influence of corporate social performance (CSP) on stock return. Corporate social performance (CSP) is measured using NH approach and stock return is measured using cumulative abnormal returns (CAR) and holding-period returns... https://danddcollectiblers.shop/product-category/kids-nutritional-health/