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I believe the graphs are all post-voucher numbers. In other words, those below the red line are the ones who qualified for the vouchers, thus the jumps in owner
by youngian 17y ago
I believe the graphs are all post-voucher numbers. In other words, those below the red line are the ones who qualified for the vouchers, thus the jumps in ownership. The punchline is that while computer games increased substantially because of the program, using computers for homework did not.
- ZeroGravitas 17y agoI considered that, but since we don't have the pre-voucher numbers, how do we know if it increased or not? It all seem to rest on there being a discontinuity between those that are nearly the same level of income but some get a voucher and some don't but, strangely, the ownership level decreases as you approach the line, then increases again. The very poorest, with the highest computer ownership, appear to have the highest computer study time too.
- youngian 17y agoQuite possibly it's just quirks in the trendlines caused by small sample size or something. I would imagine the original paper has more numbers and information on methods, but sadly it looks like it's behind a paywall.