The Reserve Bank of India’s (RBI) adoption of the Dynamic Stochastic General Equilibrium (DSGE) model to evaluate the potential consequences of Covid-19 and the subsequent lockdown on the Indian economy has recently been in the news. This article will dissect the key points of this decision and discuss the possible scenarios that could arise from this model.
Understanding the DSGE Model
The DSGE model is a procedure deployed in macroeconomics that seeks to understand economic phenomena, such as business cycles and economic growth. It clarifies the effects of economic policies using econometric models that are based on general equilibrium theory and core economic principles. Econometrics uses statistical methods to provide empirical substance to economic relationships.
General equilibrium theory, another cornerstone of macroeconomics, elucidates how supply and demand in a multi-market economy dynamically interact to ultimately result in price equilibrium.
In its application of the DSGE model, the RBI has considered three key economic players: households, the government, and firms. The lockdown has forced families to stay indoors, thereby reducing labour supply to companies. As a result, consumption and income have diminished due to the unavailability of non-essential items.
Evaluating Possible Scenarios Under the DSGE Model
The DSGE model was used to conceive three potential scenarios under the impact of the pandemic. The first scenario, referred to as Lockdown I, impacts the economy’s supply side by reducing the labour supply and its productivity.
The second scenario, Lockdown II, takes into account the marginal cost increase –- the additional cost incurred when manufacturing an extra unit of a product or service. In both situations, inflation is projected to decline. However, under Lockdown I, although production cuts are less severe, demand reduction is more pronounced due to escalating infections rates.
In contrast, during Lockdown II, firms are expected to downsize their production as profits decrease, salaries increase at a slower pace, and the economy undergoes a significant contraction. Yet the recovery from the pandemic is anticipated to be swifter in the lockdown scenario due to reduced human interaction opportunities.
The DSGE model was calibrated by the RBI for these two scenarios on the assumption that Covid-19 infections peaked around the latter half of August 2020. Moreover, the output gap (the difference between actual and potential output) was assumed to drop to about 12% of potential output at the height of the economic impact.
In both lockdown scenarios, the plunge in economic activity bottomed out in the April-June quarter of the fiscal year 2020-21 and picked up thereafter. Growth was projected to gradually turn positive from the January-March quarter of 2020-21.
Scenario Without a Lockdown
In the third scenario, where the government does not enforce a lockdown, the pandemic’s spread is more extensive and peaks in the later half of January 2021, followed by a slow recovery. This delay could induce a lasting labour shortage, and the resulting supply shock could increase inflation and diminish output.
Last Modified: February 8, 2024