[Aguerrevere, F. L. (2009). Real options, product market competition, and asset returns, Journal Finance, 64, 957-983.10.1111/j.1540-6261.2009.01454.x]Open DOISearch in Google Scholar
[Arellano, F., & Scofield, B. (2014). A ratio-based equation for operating leverage, Academy of Accounting and Financial Studies Journal, 18(4), 1-6.]Search in Google Scholar
[Baltagi, B. H., & Li, Q. (1990). A Lagrange multiplier test for the error components model with incomplete panels, Econometric Reviews, 9, 103-107.10.1080/07474939008800180]Open DOISearch in Google Scholar
[Baum, C. F. (2000). XTTEST3: Stata module to compute Modified Wald statistic for groupwise heteroskedasticity. Retrieved from http://EconPapers.repec.org/RePEc:boc:bocode:s414801]Search in Google Scholar
[Breusch, T. S., & Pagan, A. R. (1980). The Lagrange multiplier test and its applications to model specification in econometrics. Review of Economic Studies, 47, 239-253.10.2307/2297111]Search in Google Scholar
[Brigham, E. F. (1995). Fundamentals of corporate finance. Orlando, FL: The Dryden Press.]Search in Google Scholar
[Bureau van Dijk (2016). A database of comparable financial information for public and private companies across Europe Amadeus, Bureau van Dijk Electornic Publishing, update number 262. Retrieved 31 July 2016, from Amadeus website, http://amadeus.bvdinfo.com]Search in Google Scholar
[Carlson, M., Fisher, A., & Giammarino, R. (2004). Corporate investment and asset price dynamics: implications for the cross section of returns, Journal of Finance, 59, 2577-2603.10.1111/j.1540-6261.2004.00709.x]Search in Google Scholar
[Drukker, D. M. (2003). Testing for serial correlation in linear panel-data models. Stata Journal, 3, 168-177.10.1177/1536867X0300300206]Search in Google Scholar
[Dugan, M., & Shriver, K. (1992). An empirical comparison of alternative methods for the estimation of the degree of operating leverage. The Financial Revue, 27(2), 309-321. Greene, W. H. (2000). Econometric Analysis. New Jersey: Prentice Hall, Pearson Education, Inc.]Search in Google Scholar
[Gulen. H., Xing, Y., & Zhang, L. (2011). Value versus growth: time-varying expected stock returns. Financial Management 40(2), 381-407.10.1111/j.1755-053X.2011.01146.x]Open DOISearch in Google Scholar
[Hausman, J. A. (1978). Specification tests in econometrics. Econometrica 46, 1251-1271.10.2307/1913827]Open DOISearch in Google Scholar
[Lev, B. (1974 September). On the association between leverage and risk. Journal of Financial and Quantitative Analysis, 9, 627-642.10.2307/2329764]Search in Google Scholar
[Mandelker, G., & Rhee, S. G. (1984 March). The impact of the degrees of operating and financial leverage on systematic risk of common stock. Journal of Financial and Quantitative Analysis, 45-57.10.2307/2331000]Open DOISearch in Google Scholar
[Novy-Marx, R. (2011). Operating leverage. Review of Finance, 15, 103-134.10.1093/rof/rfq019]Open DOISearch in Google Scholar
[O’Brien, T., & Vanderheiden, P. (1987). Empirical measurement of operating leverage for growing firms. Financial Management, 16, 45-53.10.2307/3666003]Search in Google Scholar
[Wooldridge, J. (2002). Econometric analysis of cross section and panel data. Cambridge, MA: MIT Press.]Search in Google Scholar