Purpose - This study aims to explore the interplay between market concentration and implicit tax burdens in Brazil, offering a fresh perspective on the conventional belief of perfect competition. Design/methodology/approach - Data was sourced from Brazilian firms on the B3 stock exchange between...

Purpose This study examines whether Brazilian health insurance companies (HICs) engage in earnings management through discretionary accruals or operational decisions by refraining from reporting a low indicator of sustainability in the market (IDSM). Design/methodology/approach The study used...