Estimasi underground economy tingkat provinsi di Indonesia = Estimation of underground economi at provincial level in Indonesia

Estimasi underground economy dan potensi pajak : studi kasus Indonesia dan Rusia = Underground economy and tax potential estimates: study the case of Indonesia and Russia

Underground economy di Indonesia setelah krisis keuangan global = Underground economy in Indonesia after global financial crisis

Hubungan Underground Economy Terhadap Ketimpangan Pendapatan di Indonesia = Relationship of The Underground Economy to Income Inequality in Indonesia

Analisis Underground Economy di Indonesia Menggunakan Currency Demand Method = Analysing Underground Economy di Indonesia using Currency Demand Method