TY  - JOUR
AU  - Biesebroeck,Johannes Van
TI  - Revisiting Some Productivity Debates
JF  - National Bureau of Economic Research Working Paper Series
VL  - No. 10065
PY  - 2003
Y2  - November 2003
UR  - http://www.nber.org/papers/w10065
L1  - http://www.nber.org/papers/w10065.pdf
N1  - Author contact info:
Johannes Van Biesebroeck
Centre for Economic Studies
K.U.Leuven
Naamsestraat 69
3000 Leuven
BELGIUM
Tel: +32 16 32 67 93
Fax: +32 16 32 67 96
E-Mail: jo.vanbiesebroeck@econ.kuleuven.be
AB  - Researchers interested in estimating productivity can choose from an array of methodologies, each with its strengths and weaknesses. Methods differ by the assumptions they rely on and imply very different calculations. I compare five widely used techniques: (a) index numbers, (b) data envelopment analysis, and three parametric methods, (c) instrumental variables estimation, (d) stochastic frontiers, and (e) semi-parametric estimation. I compare the estimates directly and evaluate three productivity debates using a panel of manufacturing plants in Colombia. The different methods generate surprisingly similar results. Correlations between alternative productivity estimates are invariably high. All methods confirm that exporters are more productive on average and that only a small portion of the productivity advantage is due to scale economies. Productivity growth is correlated more strongly with export status, frequent investments in capital equipment, and employment of managers than with the use of imported inputs or foreign ownership. On the debate whether aggregate productivity growth is driven by plant-level changes or output share relocation, all methods point to the the importance of plant-level changes, in contrast to results from the U.S.
ER  -