The twin-deficit hypothesis: revisiting Indian economy in a nonlinear framework

Purpose - This paper aims to scrutinize the asymmetric interactions between current account deficit and gross fiscal deficit in case of a growing and dynamically integrated economy, namely, India featured with high inequality and liquidity constraints. Two additional variables, trade-openness and output growth, are also incorporated into the analysis to assess their likely impact on the current account balance. Design/methodology/approach - The study uses a recently developed non-linear autoregressive distributed lag model given byShinet al. (2014) in its empirical examination. In addition, non-linear cumulative dynamic multipliers are used to understand the route between disequilibrium position of short-run and subsequent long-run equilibrium of the system. Findings - The study confirms the long-run co-movements of current account deficit and gross fiscal deficit and therefore refutes the Ricardian Equivalence proposition and validates the twin-deficit hypothesis. But instead of a linear relationship of the kind examined in the previous studies, the two variables share asymmetric linkages – both in the short run and in the long run. The asymmetry indicates that positive changes are more influential than their negative counterparts in the short run, whereas in the long run, only the positive changes are found to alter the external balance statistically. The asymmetric impact of fiscal deficits on the current account balance of a country may arise due to its asymmetric impact on aggregate demand through consumption inflexibility (ratchet effect) and the existence of liquidity constraints. The other control variables used in the study are also found to have cointegration with the current account deficit, but the relationship is symmetrical in the long run, even though it is asymmetrical in the short run. The study finally uses the asymmetric cumulative dynamic multipliers to examine the route of asymmetries and adjustments over the course of time. The dynamic multipliers also confirm the results documented in the earlier part and therefore demonstrate their robustness. Practical implications - The asymmetric results obtained in the study provide strong grounds to devise the policies adaptive to changing arenas in domestic and external sectors. Output growth, export promotion and import substitution, increasing integration and fiscal austerity are seen as helpful in achieving a desired (and growth conducive) external balance together with macroeconomic stability. The need for a prudent fiscal policy and avoidance of profligacy is indicated based on the asymmetric results to ward off any unfavorable impact of fiscal deficits on external account. To conduct a sound fiscal policy, the government needs to cut down unproductive consumption expenditure, raise tax revenues and should pay attention to distribution and trickle-down effects to avoid the adversity of high inequality and liquidity constraints in the economy. Moreover, to ameliorate the current account balance, policies aimed at increasing the real competitiveness through control of domestic price fluctuations and improvement in the quality of tradable goods and services (such as productive investments and technological advancements) should be adopted. Originality/value - Work reported in the present paper is motivated by the fact that there is no study conducted so far in the Indian context which has analyzed the two deficits in a nonlinear framework. The authors have used a well-articulated nonlinear asymmetric technique to examine the relationship between two deficits when asymmetry is incorporated. This paper will, therefore, enrich the existing literature along the lines of asymmetric linkages. Moreover, the traverse of asymmetries and adjustments over the course of time highlights the inherent dynamism of the relationship.