In this work, we model the joint distribution of the error term of the OLS model, the instrumental variables, and the error term for the reduced-form equation of the endogenous regressor by a Gaussian copula. We show that exogeneity of instrumental variables is equivalent to the exogeneity of their standard normal transformations with the same CDF value. Then, we establish a Wald test for the exogeneity of the instrumental variables. We also show that this method can be used to test the exogeneity of a regressor.
PNC Distinguished Professor of Strategy and Entrepreneurship, UNC Kenan-Flagler Business School
Sarah Graham Kenan Scholar and Assistant Professor of Operations, UNC Kenan-Flagler Business School
David E. Hoffman Distinguished Professor of Accounting, Faculty Director for UNC Tax Center
Adjunct Assistant Professor of Organizational Behavior, UNC Kenan-Flagler Business School
Assistant Professor of Management and Organizations, Duke Fuqua School of Business, and 2023 Kenan Institute Distinguished Fellow
Can investing in polluting industries be a tool for fostering sustainability? Yes, according to research by Kenan Institute Distinguished Fellow Jacquelyn Pless, and it may be more effective than divesting.
Unethical behavior deeply embedded within an organization can affect employee morale and impact bigger issues, such as performance, turnover, and healthcare and legal costs.
Entrepreneurial culture celebrates the successful archetypical founder as a “lone wolf”; however, academic literature has found the majority of new entrepreneurial firms, ventures and start-ups are founded not by individuals, but by teams.
Workplaces are under pressure to be more inclusive due to public demands and rapidly changing demographics in the U.S. workforce. These commitments to diversity, equity and inclusion (DEI) aren't just moral, they're crucial to business prosperity. In this Kenan Insight, we explore strategies for startups to employ and explain why starting early is key to success.
Is the Fed’s aggressive policy working to take the froth off the labor market? Join us for the Kenan Institute’s virtual press briefing at 9 a.m. EDT this Friday, Nov. 4, as we discuss the Bureau of Labor Statistics’ fresh employment report and what it means for the U.S. economy.
U.S. President Donald Trump’s administration has recently ramped up efforts to keep immigrants from entering the country and force out some who are already here – arguing these to be necessary measures to contain the spread of COVID-19 and protect American jobs. However, in this Kenan Insight, we summarize why these policies risk having exactly the opposite effect, harming the future health, social well-being and economic viability of our nation.
The 2020 COVID-fueled economic downturn generated what has been referred to as a K-shaped recession, with both big losers (such as restaurants and the hospitality sector) and big winners (such as high tech and online retail). In this Kenan Insight, we explore how a nascent K-shaped recovery will likely affect U.S. businesses and households.