Wednesday, May 20, 2009

Fun with small samples

Alex Rodriguez, 2009 Season through 5/19/2009:

AVG: 0.194
OBP: 0.383
SLG: 0.611
OPS: 0.994
ISO: 0.417 (!)
BABIP: 0.083 (!!!)

It's pretty hard to be valuable when you get hits on less than 10% of the balls you put in play. You essentially have to do nothing but walk and hit homeruns, and that's what A-Rod is doing. It will all even out, of course, but for now, that's a pretty damn funny line.

Thursday, May 14, 2009

Today's must read blog post...

...is, of course, not found on this website. It is found here. It's short, and it has a cool animation. Check it out!

Wednesday, May 6, 2009

Mailbag, Vol. 1

A reader asks:
What would happen if pro sports stadiums weren't publicly funded? ... Suppose that you hold demand (not quantity demanded; the entire demand schedule) as constant. I think that this is basically the case, though I could be wrong. Now, assume that there is no public funding of stadiums, and that every team needs a new stadium right now.

What does the team do? Do they raise ticket prices for the new stadium, and allow QD (attendance) to fall accordingly? Do they build a smaller stadium than they otherwise would, anticipating said drop in QD? Alternately, does someone within the team organization pick up the tab that otherwise would have gone to the taxpayer? Somone's surplus is going to be lower. Will it be the owners? The players? The fans?
I love this question because it presumes that I know something about both baseball and economics. I suppose I do dabble in both of them, but I still had to go to The Font Of All Knowledge to make sure I correctly understood the difference between demand and quantity demanded. Happily, I did. In any case, those with actually expertise in the area of economics in general or stadium economics in particular may feel free to correct me if this post is completely off base. Now, on to the answer!

I think the first key point is that the baseball team is always going to select the profit maximizing price for its tickets, regardless of the cost of the stadium (or players, for that matter). Thus, if the same stadium is being built with or without public subsidy, the ticket price should be unaffected. The same product is being offered, so there is no reason to expect a change in the price the consumer is willing to pay.

Again assuming that the same stadium is being built with or without public subsidy, it is also true that the operating costs of the stadium, including players, will be unaffected. If paying A-Rod $300 million is a money maker with a stadium subsidy, then it is a money maker without a stadium subsidy. Thus, if the same stadium is being built in both cases, the only group that can take a loss is the team itself. 

Another way to think about it is that a fixed subsidy amount doesn't change the optimal configuration of the new stadium. If investing the subsidy in extra features for the new stadium could be expected to turn a profit, then the team would do it regardless of the existence of the subsidy. Likewise, if investing the subsidy in extra features for the new stadium was expected to be a money losing proposition, the team would (if able) cut back on its own contribution to the stadium, in effect pocketing the subsidy money.

However, a key element is left off of this analysis. The stadium plan is usually a large part of the negotiations with the local municipality. While it may not be cost effective for a team to invest $100 million in, for example, a retractable roof, it might be worth it if it only had to invest $50 million with the local municipality agreeing to kick in the rest.* Thus, the team will try to add features to the new stadium as long as the public subsidy increases to a level that makes the extra features a good investment of the team's money. The subsidy amount is generally not fixed with respect to the stadium plan.

What does this mean? It means that if public subsidies for private stadia ended, the team would start cutting the marginal features of the new stadium.** That retractable roof may no longer make sense. Of course, this adds a further complication. Since we are now dealing with two separate stadia, we cannot expect that operating costs and optimal ticket prices will be unchanged. Indeed, since fewer ammenities are being added, we would expect the profit maximizing ticket price to fall, not rise, since people would presumably be willing to pay more to attend games at a nicer stadium.

Thus, I conclude that public subsidies of new stadia lead to higher ticket prices for fans, but also to nicer stadia. Ending public subsidies would lead to lower ticket prices for fans, but also fewer and less opulent new stadia.

Let me finish with one final comment on the closing line from the email in question:
I just looked up the Jake on Wikipedia, and it said that they publicly funded their stadium, then sold out 455 straight games.
Jacobs Field is often used as an example of the benefits of new stadia. However, we must be very careful not to confuse correlation with causation. Yes, fans flocked to Jacobs field, but only a small amount of that should be attributed to the new stadium bounce. Indeed, the primary cause is likely to be that the Indians' general crappiness from 1987 through 1993 allowed them to draft a stunning core of players that fueled their run as a top team in baseball from 1994 through 2001. Think about what the Tampa Bay Rays are going through right now. It's like that, only in a town that actually cares about baseball. The new stadium was only the cherry on the top of the winning baseball sundae.

* I will further note that it is often the municipality that bears the risk of cost overruns. This provides a perverse incentive for owners to underestimate costs so as to drive down their share of the initial cost with the local municipality bearing any extra costs due to the low initial estimate.

** It is not clear to me what the effect would be on stadium capacity. I suspect that capacity is a relatively low cost item in the stadium plan with a correspondingly high marginal value. Indeed, ending public subsidies could even increase stadium capacity. It may be that if a team cannot charge hundreds of dollars for a more exclusive experience with many ammenities that the best option is to instead try to get as many normal blue-collar Joes as possible. In any event, I find it unlikely that capacity would decrease.

Tuesday, May 5, 2009

How rapidly can one naturally increase strength?

Squawking Baseball addresses the allegation that A-Rod must have been using steroids because of how rapidly he increased his bench press. It's a short read, but hard to quote succinctly, so let me sum it up like this:
  1. It is very possible to naturally increase the amount of weight you are lifting very rapidly.
  2. It is even more possible when you are as young as A-Rod is alleged to have been when he made his rapid strength gains.
  3. It is even more possible when you consider that A-Rod was already outlandishly gifted physically with massive incentives for increased strength.
Yes, I am aware that point three is also an argument that he did use steroids.

It's important to remember that weightlifting was something in which baseball players did not engage for many, many years. Untangling the effects of naturally increasing strength due to weightlifting from the effects of increased strength due to PED usage while weightlifting is nearly impossible.

Thursday, April 30, 2009

Craig Calcaterra hits it out of the park

What I do care about -- and the reason I have quoted all of this stuff by and about Selena Roberts -- is the culture of character assassination that has become inextricably linked to the subject of steroids in baseball. Every big name who has tested positive has not only been branded a cheater by the media, but a dirty cheater with evil and chicanery in his heart. Every assertion of innocence -- even to subordinate allegations -- has been met with scorn. In addition to censuring players under the rules of baseball, the media (and the public at large following the media's lead) has further demanded that high-profile steroids users be ostracized, and that the historical record be expunged, as best it can be, of their very existence. It has been a shameful few years in this regard, and I hope and pray that one day some semblance of perspective on the subject of performance enhancing drugs in baseball prevails. But we're certainly not there yet.

Wednesday, April 22, 2009

Maybe it's not the new stadium...

From here:
The distance of the home runs being hit this year (the true distance, i.e where they actually land, as well as the standard distance, which factors out weather and altitude) is significantly higher than last year, with the average standard distance being 8.5 feet longer this year than last. 
The p-value actually works out to 0.0000341, which is a very strong indicator that something is making 2009 home runs fly farther than 2008 home runs, in isolation of the weather, and to me that implicates the ball. 
Ball speed off the bat is also up. And, as you would expect, so are home run totals. I will say that, as others have observed, the ball has appeared to me to be exploding off bats this year. I've been amazed at some of the balls that have gotten out at Yankee Stadium. Maybe my observations are being influenced by other people's commentary, but I thought I'd throw that out there. Apparently, this phenomenon is going on everywhere.

One of the most underreported stories of the so-called "Steroid Era" is that the spike in offense was not the gradual increase that one would expect if steroids were slowly permeating the game. It was a very sharp spike in the early 1990's (starting in 1993, if my memory serves; could be 1994). If we are to accept that steroids caused the surge in output, we must accept that hitters all started using simultaneously. This is highly unlikely. The much more likely explanation is that something changed about the playing environment, something universal.

The most likely culprit is the ball, and indeed there is empirical evidence demonstrating that the core of the ball changed and changed enough to cause a spike in home runs. It appears that something fishy is going on again this year. I'll be very interested to see how this plays out.

UPDATE: Apparently Brian Cashman reads the same blogs I do. ESPN reports that "Cashman also said home runs are traveling about eight feet farther so far this year compared to last season." Furthermore, Cashman is quoted as saying, "The ball is going farther in every park, not just ours." Fascinating.

**EDIT** Fixed typo noted in comments.

Wednesday, April 15, 2009

Joe Sheehan confirms my bias about confirmation bias

Sometimes being right isn't all that much fun; as arrogant as it is to say this, I'm fairly familiar with the concept. Let's be clear, too, that this applies when the first week of the season confirms my biases. The Astros are a bad baseball team that probably has the worst bottom 20 roster spots in MLB; that they're 1-5 with the worst run differential in baseball doesn't tell us much more than we knew a week ago. Just because a small sample confirms your pre-season analysis doesn't make it any more valid.
Bingo.