Table 1 The independent variables in the study’s models
Category | Variable | Definition/scale | Source of data | In which model was used |
|---|---|---|---|---|
Macroeconomic factors | GDP per capita | 1/100 purchasing power parity (PPP) and fixed dollars (2011) | World Bank | The panel data model of OECD countries and the first and second time-series model of Iran |
Health system structure | Share of government health expenditures | The percent of government health expenditures in total government expenditures | WHO | The panel data model of OECD countries and the first time-series model of Iran |
The percent of government health expenditures in GDP | World Bank | The second time-series model of Iran | ||
Disease profiles | DALY disability-adjusted life-years | Per year for 100,000 population/this variable reflects the health status of the population | World Burden of Disease website | The panel data model of OECD countries and the first and second time-series model of Iran |
Disease prevalence | Number of patients in the total population | World Burden of Disease website | The second time-series model of Iran | |
Pharmaceutical system structure | Generics share | generics volume share of total pharmaceutical market volume | The OECD website, Pharmaceutical statistics yearbook of Iran | The panel data model of OECD countries and the first and second time-series model of Iran |
Pharmaceutical price index | Divide total pharmaceutical cost and total volume of numerical consumption annually | Pharmaceutical statistics yearbook of Iran | The second time-series model of Iran | |
Innovation | New drugs to market annually | Number of drug entered in the drug list each year | Iran drug list | The second time-series model of Iran |