Notes, Comments and Preliminary results Apr 09 2021 Mohsen Bahmani-Oskooee , Tsangyao Chang , Zahra Elmi and Omid Ranjbar   Testing the degree of persistence of Covid-19 using Fourier quantile unit root test   Abstract  Contact Information  Citation  Full Text  -  Note   Dec 13 2015 Omid Ranjbar and Zahra (Mila) Elmi   Analyzing the effect of financial development and trade openness on income convergence   Abstract  Contact Information  Citation  Full Text  -  Note