Economic Decomposition and Convergence Analysis

Decomposition Framework

The Draghis framework breaks down a country’s income into several components related to production, labor markets, and demographics.

Objective

Identify sources of income differences across countries and determine whether low GDP per capita is due to weak productivity, unemployment, low labor participation, or adverse demographic trends. It can effectively detect structural bottlenecks.

Case Study: Spain

Spain faces low productivity and persistent labor market problems, including high unemployment and low activity rates, compounded by population aging. Consequently, the model justifies the need for labor market, education, and productivity-enhancing reforms.

Real Convergence

Poorer countries tend to grow faster than richer ones. The objective of this model is to evaluate the effectiveness of economic integration and reforms. Convergence depends on:

• Productivity
• Human capital
• Institutions
• Labor market efficiency

Spain: Experienced strong convergence after joining the EU, followed by the 2008 crisis. However, structural weaknesses—particularly low productivity and labor market duality—have limited sustained convergence and led to stagnation relative to more advanced economies.

The KM Model

The KM model explains output and employment through the interaction of aggregate demand and price. The IS equation represents aggregate demand, determined by consumption, investment, and public expenditure, while the PC equation reflects firms’ prices and costs.

Objective

Determine the level of output in the short run and demonstrate that equilibrium production does not necessarily coincide with full employment. It helps analyze economic downturns by showing how negative demand shocks reduce output and employment when prices do not adjust immediately.

Spain: The KM model helps explain deep recessions and persistent unemployment following demand collapses, highlighting the importance of countercyclical fiscal policy.

The Income Perspective

The income perspective is a cost-based framework that explains how production costs determine prices, competitiveness, and income distribution. Total costs are mainly composed of labor costs, which play a central role.

Unit Labor Costs (ULC) measure labor compensation per unit of output. They depend positively on wages and negatively on productivity:

• If wages increase faster than productivity, ULC rises, leading to lower firm competitiveness.

From this relationship emerges the labor income share, defined as the proportion of total income accruing to labor. This is used to analyze inflation, competitiveness, and wage-setting behavior.