I have a problem in economics on Wage differentials-union and nonunion workers. Please help me in the following question. The wage differentials among union and nonunion workers encompass historically averaged roughly: (i) 10% to 15 %. (ii) 5% to 10%. (iii) 15% to 20%. (iv) 25% to 33 %. (v) 20% to 25%.
Select the most correct answer.