We would like to thank the Reviewer to recommend us to develop this part. The Reviewer raises a very interesting point. However, the prefectural-level data in terms of farmland are only reported until 2007 in the China City Statistical Yearbook.
As a suggestion for this paper or another, having the data of output, labor and land, it is also interesting to analyze the agricultural labor productivity explained by the agricultural land productivity and land-labor ratios. Maybe, some simple correlations between the growths of agricultural labor productivity vs land productivity and land-labor ratio could enrich this or future analysis.