NASHVILLE, Jan. 27 (AP) — Light-skinned immigrants in the United States make more money on average than those with darker complexions, and the chief reason appears to be discrimination, a researcher says. The scholar, Joni Hersch, a professor of law and economics at Vanderbilt University, looked at a government survey of 2,084 legal immigrants to the United States from around the world and found that those with the lightest skin earned an average of 8 percent to 15 percent more than similar immigrants with much darker skin. “On average,” Dr. Hersch said, “being one shade lighter has about the same...