Astral Codex Ten Podcast feed 2024年07月17日
Considerations on Cost Disease [Classic]
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本文探讨了成本疾病在教育、医疗等领域的具体表现。作者通过数据分析,指出过去几十年里,教育支出大幅增加,但学生成绩提高有限;同样,大学学费飙升,但教育质量提升不明显;医疗成本也在不断上升。这些现象表明,成本增加并未带来相应的质量提升。

📈 教育支出增加:过去四十年来,即使调整通货膨胀,每个学生的支出也增加了约2.5倍。然而,学生的测试成绩基本保持不变,这表明支出的增加并未带来教育质量的显著提升。

🎓 大学学费飞涨:自1980年以来,大学教育的实际成本飙升,从每年约2000美元增加到接近20000美元。尽管如此,现代大学是否提供了比过去更高的价值仍是个疑问。

🏥 医疗成本上升:医疗领域的成本也在不断上升,但这种增长并未带来医疗服务质量的显著提高。医疗成本的增加对普通民众构成了经济负担。

I.

Tyler Cowen writes about cost disease. I’d previously heard the term used to refer only to a specific theory of why costs are increasing, involving labor becoming more efficient in some areas than others. Cowen seems to use it indiscriminately to refer to increasing costs in general – which I guess is fine, goodness knows we need a word for that.

Cowen assumes his readers already understand that cost disease exists. I don’t know if this is true. My impression is that most people still don’t know about cost disease, or don’t realize the extent of it. So I thought I would make the case for the cost disease in the sectors Tyler mentions – health care and education – plus a couple more.

First let’s look at primary education:

 

 

There was some argument about the style of this graph, but as per Politifact the basic claim is true. Per student spending has increased about 2.5x in the past forty years even after adjusting for inflation.

At the same time, test scores have stayed relatively stagnant. You can see the full numbers here, but in short, high school students’ reading scores went from 285 in 1971 to 287 today – a difference of 0.7%.

There is some heterogenity across races – white students’ test scores increased 1.4% and minority students’ scores by about 20%. But it is hard to credit school spending for the minority students’ improvement, which occurred almost entirely during the period from 1975-1985. School spending has been on exactly the same trajectory before and after that time, and in white and minority areas, suggesting that there was something specific about that decade which improved minority (but not white) scores. Most likely this was the general improvement in minorities’ conditions around that time, giving them better nutrition and a more stable family life. It’s hard to construct a narrative where it was school spending that did it – and even if it did, note that the majority of the increase in school spending happened from 1985 on, and demonstrably helped neither whites norminorities.

I discuss this phenomenon more here and here, but the summary is: no, it’s not just because of special ed; no, it’s not just a factor of how you measure test scores; no, there’s not a “ceiling effect”. Costs really did more-or-less double without any concomitant increase in measurable quality.

So, imagine you’re a poor person. White, minority, whatever. Which would you prefer? Sending your child to a 2016 school? Or sending your child to a 1975 school, and getting a check for $5,000 every year?

I’m proposing that choice because as far as I can tell that is the stakes here. 2016 schools have whatever tiny test score advantage they have over 1975 schools, and cost $5000/year more, inflation adjusted. That $5000 comes out of the pocket of somebody – either taxpayers, or other people who could be helped by government programs.

Second, college is even worse:

 

 

Note this is not adjusted for inflation; see link below for adjusted figures

 

Inflation-adjusted cost of a university education was something like $2000/year in 1980. Now it’s closer to $20,000/year. No, it’s not because of decreased government funding, and there are similar trajectories for public and private schools.

I don’t know if there’s an equivalent of “test scores” measuring how well colleges perform, so just use your best judgment. Do you think that modern colleges provide $18,000/year greater value than colleges did in your parents’ day? Would you rather graduate from a modern college, or graduate from a college more like the one your parents went to, plus get a check for $72,000?

(or, more realistically, have $72,000 less in student loans to pay off)

Was your parents’ college even noticeably worse than yours? My parents sometimes talk about their college experience, and it seems to have had all the relevant features of a college experience. Clubs. Classes. Professors. Roommates. I might have gotten something extra for my $72,000, but it’s hard to see what it was.

Third, health care. The graph is starting to look disappointingly familiar:

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成本疾病 教育支出 大学学费 医疗成本
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