PRODUCTIVITY CHANGES OVER TIME – THEORETICAL AND METHODOLOGICAL FRAMEWORK

The TFPV Malmquist index is one of the tools that does not require knowledge of the price level and qives information on factors affecting productivity changes over time. The DEA-based approach allows decomposing of the TFPC indices into:technical change ( Δ T),technical efficiency change ( ΔTE) and scale efficiency change (Δ SE). A panel data from the companies of a key food processing sector, namely the meat processing, was used in the paper. The sample consisted of above 200 objects. The results indicated which of the decomposed indices ( ΔT, ΔTE, ΔSE) had the greatest impact on productivity changes in the analyzed sector.