Pengaruh karakteristik perusahaan dan reformasi perpajakan terhadap tarif pajak efektif: studi pada perusahaan yang terdaftar di Bursa Efek Indonesia tahun 2009-2015 = The influence of firm characteristic and tax reform to effective tax rates: study on companies listed on the Indonesian stock exchange in 2009-2015

Analisis pengaruh cash holding, leverage, dan tingkat pajak terhadap nilai perusahaan yang berkendala keuangan : studi pada perusahaan manufaktur di Bursa Efek Indonesia periode 2006-2011 = Analysis the impact of cash holding, leverage, and tax rate toward firm value with financial constraints empirical : study on manufacturing firms listed in BEI within period of 2006-2011

Pengaruh hubungan politik dan reformasi perpajakan terhadap tarif pajak efektif pada perusahaan yang terdaftar di Bursa Efek Indonesia tahun 2008-2009 = Influence of political connection and tax reformation to effective tax rate of listed company in the Indonesian Stock Exchange on 2008-2009

Analisis pengaruh kepemilikan institusional terhadap book tax differences pada perusahaan yang terdaftar di Bursa Efek Indonesia tahun 2011 = An analysis of the effect of institutional ownership on book tax differences empirical study at registered company on the Indonesian Stock Exchange year 2011

Analisis pengaruh perubahan tarif PPh Badan UU No.36 Tahun 2008 terhadap nilai EVA, ROI, dan EPS serta faktor penentu tarif pajak efektif pada perusahaan yang terdaftar dalam industri manufaktur periode 2007-2011 = Analysis of effect of corporate tax rates amandements act No.36 of 2008 againts EVA, ROI and EPS with determinant factors of effective tax rates in company registered in manufacture industry for periode 2007-2011.