List of Articles panel threshold approach model Open Access Article Abstract Page Full-Text 1 - Investigating the non-linear relationship between environmental pollution and inequality of income distribution with the effectiveness of environmental effects mahboobeh sadeghinori marjan damankeshideh roya seyfipour amir reza kayghobadi Open Access Article Abstract Page Full-Text 2 - The impact of the marginal effects of the government's construction and current expenditures on economic growth with an emphasis on the degree of economic openness and insurance premiums paid by producers (case study of the country's provinces) Mohammadamin Nahal بیژن باصری Open Access Article Abstract Page Full-Text 3 - Threshold effect of carbon tax on the relationship between environmental pollution and inequality of income distribution in order to improve social development mahboobeh sadeghinori Roya Seyfipour مرجان marjan دامن کشیدهdamankeshideh Amir Reza Keyghobadi