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. 2013 Aug 14;8(8):e69887. doi: 10.1371/journal.pone.0069887

Table 2. Summary of balance of the control variables before and after matching for Protected Area (PA) and natural forest Timber Concession (TC) plots.

Variable Means in TC cells Means in PA cells SD Control Mean Diff eQQ Med eQQ Mean eQQ Max
Travel time to cities (hr) Before 43.1 61.9 45.8 −18.8 18.1 18.7 37.6
After 48.9 56.6 41.7 −7.8 7.9 7.8 26.3
% Balance Improvementa 61.9% 61.1% 61.8% 40.6%
Travel time to mills (hr) Before 42.4 64.6 44.5 −22.2 23.9 22.2 40.0
After 49.4 55.5 41.4 −6.1 4.2 6.1 37.0
% Balance Improvementa 74.1% 88.0% 74.0% 17.6%
Travel time to roads (hr) Before 41.7 59.0 42.3 −17.3 18.7 17.2 33.6
After 48.0 55.1 41.0 −7.1 7.2 7.1 16.8
% Balance Improvementa 62.3% 68.2% 62.2% 53.6%
Travel time to plantations (hr) Before 39.6 63.6 45.0 −24.0 26.0 24.0 44.3
After 47.4 54.0 40.5 −6.6 6.3 6.6 22.4
% Balance Improvementa 74.8% 81.6% 74.7% 51.3%
Elevation (m) Before 359.7 636.4 400.5 −276.6 326.7 282.8 439.4
After 453.5 505.0 312.5 −51.5 65.6 66.6 371.9
% Balance Improvementa 82.6% 80.8% 77.6% 14.1%
Slope (percent) Before 17.1 24.2 13.2 −7.1 7.7 7.3 30.9
After 20.5 21.8 12.0 −1.3 1.1 1.4 11.1
% Balance Improvementa 80.1% 81.3% 79.9% 87.0%