His main research interests are applied macroeconomic theory and policy and time series econometrics. His work has appeared in international publications, including Computational Statistics and Data Analysis, Empirical Economics, European Journal of Political Economy, International Journal of Forecasting and South African Journal of Economics among others. Prof Ruthira is a member of the Economic Association of South Africa (ESSA), the African Econometric Society (AES) and Economic Research Southern Africa (ERSA).