| Variable | Description |
| Export (X) | The value of export; deflated by the export price index. |
| Exchange rate (ER) | US Dollar per Rial. |
| Inflation (INF) | Percentage growth of CPI. |
| Competition (COM) | The number of firms in any industry. |
| Investment (INV) | The value of investment in industry; measured by division of the value of fixed capital formation in producer price index. |
| Vector of energy conveyors (EC): |
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| Fuel (FU) | The volume of liquid fuels including gasoline, diesel oil, kerosene, petroleum and furnace oil. |
| Electricity (EL) | The quantity of consumed electricity. |
| Gas (G) | The volume of natural gas, consumed by industries. |
| R & D (RD) | The expenditures on research and development. |
| Vector of education (EDU): |
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| Under−secondary schooling (UDIP) | The ratio of the number of productive employees who their years of schooling are less than 12 to the whole of productive employees. |
| Secondary schooling (DIP) | The ratio of the number of productive employees who completed secondary education to the whole of productive employees.. |
| Education in school (SE) | The sum of UDIP and DIP. |
| Two years college (TC) | The ratio of the number of productive employees with two years education in university to the whole of productive employees. |
| Bachelor of Arts or Science (BA) | The ratio of the number of productive employees who have graduated in university with BA or BS to the whole of productive employees. |
| Master of Arts or Science (MA) | The ratio of the number of productive employees who have graduated in university with MA or MS to the whole of productive employees. |
| Doctor of Philosophy (PHD) | The ratio of the number of productive employees who have PhD degree to the whole of productive employees. |
| Higher education (HE) | The sum of TC, BA, MA and PhD. |