How Islamic are Islamic Countries?

In the post 9/11 era, there is growing interest in the complex relationship between religion, economics, finance, politics, law, and social behavior. This has brought with it a disagreement on how to investigate the impact of religiosity, whether religion affects the economic, political, and social outlook of countries or whether these factors affect religiosity? In other words, should religion be viewed as a dependent or an independent variable? In this paper we ask what we believe to be the precursor question to such linkages, namely, do self-declared Islamic countries, as attested by membership in the OIC (Organization of Islamic Conference), embrace policies that are founded on Islamic teachings? We believe that only once this question is addressed can one begin to estimate how Islam adherence to Islam may affect economic, political and social behavior. In the first part of the paper we present what we believe should be the characteristics and scaffolding of an "Islamic" country. We base our depiction on the Quran, and the life, practices and sayings of the Prophet Mohammad -- the two principal channels that provide Muslims with the road map. In the second part, we develop an index to measure the "Islamicity" of Islamic and non-Islamic countries. This IslamicityIndex (or I2) measures 208 countries adherence to Islamic principles using four sub-indices related to economics, legal and governance, human and political rights, and international relations.