Starting Price and Forecast price

Question

In the table Historic_runners data there are columns Starting Price and Forecast price?
At what time are this prices fixed? 
Do I understand correctly that Forecast price is a price that BF gives several days before the race? 
And is Starting Price the price in Exchange where the race starts and there are only in-play bets available?

Answer 1

Starting price is the industry SP (not exchange) that is approximately the average of all starting prices being offered by bookmakers on course when any race begins.

Forecast price is a forecast or tissue based on odds compiler estimates the day before the race is run, attempting to forecast the industry SP (as defined above).