In the paper by Jia and Pathak (2010), what is the impact of the buyer's agent commission on the total number of days on the market, conditional on sale, when both month and zip code-year fixed effects and house characteristics are included in the model? You only have to give the reported coefficient and standard error as your answer e.g. "1.23 (4.56)", where the standard error is in parentheses. There is no need to interpret the model results.