najafi, Z., Azarbayjani, K., & sameti, M. "An Investigation of the Effects of Innovation and Government Size on Intra-Industry Trade Based on The Shumpeter's Model", Journal of Economic Research (Tahghighat- E- Eghtesadi), 53, 3, 2018, 701–724. doi: 10.22059/jte.2017.242384.1007712