In our time, Krugman argues, the malefactors of megawealth have triumphed.

Snce the plots were wheel-hoed and handweeded twice, the number of man-minutes to handweed each plot is a good indication of the effect of the different treatments on the different weed species.

Figure 3.12 shows the number of overtakings as a function of the density of the vehicles. In general, the smaller the number of overtakings, the safer the traffic.

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