I used to make very occasional place bets, limiting myself to situations were my key was 25-1 or higher and I was playing the key with two or three favs, the theory being that if a horse other than the favs won & my key finished 2nd, the place payoff would be high enough to show a profit on the race. After a debate on this board, and researching both my records & the literature, however, I eliminated even the occasional place bet, although I still believe there is a psycological benefit to avoid not cashing when you\'ve correctly identified a 25-1 or higher overlay. If you have a serious interest in place & show betting, you might want to read Barry Meadow\'s chapter on the subject in his book \" Money Secrets At The Racetrack\", which among other things explains why the algorithms for the Dr Z system are wrong, although the best part of the book deals with pk3 & pk4 wagering strategies.
If you do, you will find the accepted wisdom, namely that as a general proposition it is the low odds horses which are underbet to place & show. However, Meadows\' book was written in the pre-rebate era, and I am still trying to get a handle on how some of the perverse incentives rebates cause are affecting win,place,show and other bets. Let\'s say, for example, that you\'re one of the 120 customers of RGS(a subject I hope to address in another post), which means that your per capita betting is $4.7 million & you are entitled to a 10% rebate. In other words, if you break even for the yr you actually end up with a $470k profit courtesy of the rebate. Moreover, the rebate apparently applies to place & show bets, so it\'s easy to see why in a variety of situations such bets might have a a much greater attraction to a \"whale\" than they ever have had in the past.