Considering the graphs above, roughly what is the effect of…

Considering the graphs above, roughly what is the effect of an additional $1,000 of salary offer on the probability of job acceptance?   Write your answer in the first line below.   Then you may explain your calculations. I will use your answer for partial credit. Briefer is better.

Setting aside any possible concern from the prior question,…

Setting aside any possible concern from the prior question, what would you say is the difference-in-differences estimate of the effect of air conditioning on output?   Write your answer in the first line below. Then you may explain your calculation below that. I will use your explanation to give partial credit. Briefer is better.