My question concerns the law of diminishing mpp. Why must crusoe pick less berries the second half hour than the first? Is it not possible to pick 2 quarts of berries the first half hour then 3 quarts the second?
Not under the circumstances stipulated. If the berry bushes are configured diversely on the island, with some more robust and some nearer to Crusoe’s shelter and others less robust and some further away and if Crusoe is concerned in his berry picking activity with the end of producing berries (instead of some combination of ends, like picking berries getting exercise), then he will allocate his first efforts toward the most robust berry bushes nearby and having exhausted them he will move on to the next most robust berry bushes nearby and so on.