قياس أثر ومساهمة كل من الناتج الصناعي والزراعي وعائدات الضرائب على الناتج المحلي الإجمالي الليبي خلال الفترة (1990-2020)

The Libyan economy is a rentier economy dominated by oil output as the main source of GDP, which undoubtedly represents a fundamental and pivotal flaw in this economy, making it more volatile and less capable of achieving economic stability due to the oil sector's lack of adherence to internal economic control. From this perspective, the study aimed to measure the contribution of both the manufacturing and agricultural sectors, in addition to tax revenues, and to identify the strength and direction of the impact of these outputs on the Libyan GDP. To achieve this goal, the researchers relied on the inductive approach and the standard method, which, after conducting stability tests, indicated that the optimal methodology is the autoregressive distributed lag model. The results indicated a statistically significant positive impact of both agricultural and industrial outputs on the dependent variable represented by gross national output, with their elasticity being (0.66 and 0.34) respectively, while the impact of tax revenues was negative and significant, with its elasticity estimated at about (0.41). One of the main recommendations of the study is the necessity to adopt plans and programs for the development and integration of the industrial and agricultural sectors to achieve higher contribution rates to the formation of GDP. Keywords: GDP, industrial output, agricultural output, tax revenues, Libyan economy.