Dr Suresh Kumar Sahani. THE EFFECTIVE THEORY OF PRODUCER AND CONSUMER SURPLUS: POSITIVE DEMAND, NEGATIVE SUPPLY. CAJMTCS [Internet]. 2023 Aug. 17 [cited 2026 Sep. 11];4(8):70-6. Available from: https://cajmtcs.casjournal.org/index.php/CAJMTCS/article/view/500