Wage Gap Across Gender and Race in US – Finding the true numbers

How would someone go about finding the true wage gap numbers across gender and race groups in the US?

Step 1: Find a reputable source.
Step 2: Read the small print.
Step 3: Check the source.
Step 4: Find out if the statistics accurately reflect all groups.

Chosen excerpts by Job Market Monitor. Read the whole story at  Equal Pay Day: a wage gap fact check | US news | The Guardian