Analisis pengaruh merger dan akuisisi terhadap kinerja perusahaan (profitabilitas, likuiditas, dan leverage) di Indonesia: studi empiris pada perusahaan listed non-finansial periode 2009-2016 = The impact of merger and acquisition on corporate performance (profitability, liquidity, and leverage) in Indonesia an empirical: study of non financially and listed companies in 2009-2016