The study investigates the relative efficiency and productivity change of Upper Secondary Schools in the region of … Central Greece during the period 2016-2019. It measures the technical and scale efficiencies and productivity change by using … . The efficiency under constant returns to scale varies in interval [0.666-1.000] and under variable returns to scale in …

-level productivity. We also examine whether M&As increase efficiency through reallocation of production to more efficient plants or …Study of the impact of mergers and acquisitions (M&As) on productivity and market power has been complicated by the … difficulty of separating these two effects. We use newly-developed techniques to separately estimate productivity and markups …