Created
June 6, 2011 02:33
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| set.seed(209) | |
| N_firms =125 | |
| N_periods =25 | |
| BusID = 1:N_firms | |
| period = 1:N_periods | |
| long = runif(N_firms, -124, -68.25) | |
| lat = runif(N_firms, 26, 47) | |
| locs = data.frame(BusID, long, lat) | |
| per = rep(period, each=N_firms) | |
| mydat = cbind(per, locs) | |
| mydat[per<6,3:4]=NA |
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