Research Article
Scenario Analyses of Land Use Conversion in the North China Plain: An Econometric Approach
Table 2
Descriptive statistics of main variables at county level.
| | Variable | Obs | Mean | Std. Dev. | Min | Max |
| | Population | 1633 | 614909.90 | 421749.10 | 63245 | 6600841 | | Annual per capita income (Yuan) | 1366 | 1959.64 | 2414.40 | 823 | 46739 | | Total grain output (T) | 1392 | 294692.9 | 207261.60 | 0 | 2231531 | | Price index of agricultural products | 1935 | 104.12 | 3.30 | 101.30 | 108.40 | | Price index of forestry products | 1935 | 105.20 | 1.98 | 102.30 | 108.50 | | Price index of animal husbandry products | 1935 | 111.62 | 7.92 | 100.50 | 123.90 | | NPP (net primary productivity) (gc/m2·y) | 1933 | 352.66 | 85.39 | 143.74 | 827.50 | | Annual average precipitation (mm) | 1930 | 688.14 | 208.84 | 257.44 | 1562.09 | | Annual average temperature (°C) | 1930 | 13.57 | 1.46 | 3.23 | 16.28 | | Land quality (dummy variable) | 1915 | 499.58 | 142.50 | 54.00 | 868.07 |
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The observations are different because of the data availability in several counties (387 counties * 5 periods).
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