I did, however, want to mention an interesting paper on this topic by Kathryn Pearson and Eric McGhee. Examining congressional election returns from 1984 to 2010, they confirm some of the findings Ball mentions, but they note the backstory behind these stats: female candidates tend to be of higher quality than male candidates; far more of the female candidates have previous electoral experience.
There's an additional wrinkle when the results are broken down by party:
Democratic women raise more money and run in more politically favorable districts than their male counterparts do, enhancing their viability and chances of success. When these advantages are included in multivariate models predicting victory, Democratic women are actually somewhat less likely to win than Democratic men.
What all this means is that there's actually a vote penalty for running female. We just usually don't observe it in the aggregate because female candidates, particularly Democrats, tend to run with some other advantages (previous experience, more money, more favorable districts). Put another way, yes, women have to work harder to do as well as men do in elections.