This study measures productivity growth using the Metafrontier Malmquist-Luenberger productivity growth index (MML index) method and decomposes the index. The results are compared with those obtained from the conventional Malmquist-Luenberger (ML) productivity growth index. MML has two...

Policy attention to the security industry increased substantially after the terrorist attacks in the U.S. on September 11th, 2001. With an increased demand for security, the global security market grew a tenfold to around €100 billion in 2011. Many studies expect that growth of the worldwide...