卡内基国际和平基金会-Minimum-Wages-and-the-Wage-Structure-in-Mexico_28页_896kb

Summary of "Minimum Wages and the Wage Structure in Mexico"

Core Content

This paper examines the role of minimum wages in shaping the wage structure in Mexico, challenging the conventional view that minimum wage policies have little impact on wage distribution. The authors argue that minimum wages function as a normative reference point for wage setting across the entire economy, including both formal and informal sectors.

Main Points

• Minimum Wages as Norms: Minimum wages in Mexico are not just a lower bound but serve as a norm for wage setting across the economy. Wages are frequently set as multiples of the minimum wage, particularly for low-skill workers.

• Clustering Around Multiples: There is evidence of clustering in wage distributions around specific multiples of the minimum wage. This pattern is more pronounced in the lower and mid-tail of the wage distribution, indicating that minimum wage norms have a stronger influence on lower wages than on higher ones.

• Informal Sector Influence: Contrary to the belief that the informal sector is unaffected by minimum wage policies, the study finds that the normative influence of minimum wages is also significant in this sector. This challenges the traditional assumption that informal workers are not subject to such norms.

• Impact of Stabilization Policies: Minimum wage changes were used as signals in stabilization policies during the late 1980s and early 1990s. These policies aimed to control inflation and government payroll costs, and they reinforced the normative role of minimum wages in wage setting.

• Real Minimum Wage Decline: The declining real value of the minimum wage over the past two decades may have contributed to growing wage inequality in Mexico. This is because the normative influence of minimum wages is stronger in the lower tail of the wage distribution, where wages are more sensitive to minimum wage changes.

• Statistical Significance: The study provides statistical evidence of the relationship between wages and minimum wage multiples. The percentage of workers earning wages that are multiples of the minimum wage is higher when allowing for measurement error, and the correlation is negative and significant, indicating that low-wage workers are more likely to be influenced by minimum wage norms.

Key Findings

• In 1984, only 5% of formal sector workers earned less than the minimum wage, and in 1992, this dropped to 2.5%. This suggests a gradual increase in wage levels above the minimum wage.

• Clustering of wages around minimum wage multiples is observed in both formal and informal sectors, with more than 40% of the sample in 1992 having wages that are multiples of the minimum wage when allowing for a ±0.05 error band.

• Wage changes in certain occupations closely follow changes in the minimum wage, reinforcing the idea that minimum wages act as a reference point in wage negotiations.

• The normative role of minimum wages is stronger in the mid-to-lower tail of the wage distribution, indicating that they have a greater impact on lower-income workers than on higher-income ones.

• The decline in real minimum wages and the reinforcement of stabilization programs may explain part of the wage inequality in Mexico during the late 1980s and early 1990s.

Empirical Analysis

• Data Sources: The study uses data from the Comisión Nacional de Salarios Minimos and the Encuesta Nacional de Ingresos y Gastos de los Hogares (ENIGH) for the years 1984, 1989, and 1992.

• Sampling: The sample includes individuals 16 years of age or older, working in the formal and informal sectors. Self-employed and workers without pay are excluded, and those with multiple jobs are also excluded.

• Methodology: The authors use nonparametric kernel density estimates and statistical correlation tests to analyze wage clustering and its relationship with minimum wage multiples.

• Clustering Definition: A cluster is defined as a group of workers earning the same hourly wage and making up at least 2% of the sample. This threshold was determined through a series of proportion tests.

• Results:

  • In 1984, 17% of clusters matched 0.25 multiples of the minimum wage, increasing to 72% when allowing for a ±0.05 error band.
  • In 1992, no exact matches were found, but allowing for a ±0.05 error band, 77% of clusters matched minimum wage multiples.
  • The percent of the sample earning a multiple of the minimum wage increased from 3% in 1984 to 44% in 1992 under the ±0.05 error assumption.

Conclusion

The paper concludes that minimum wages in Mexico play a normative role in wage setting, influencing wage levels and changes across the occupational distribution. The decline in real minimum wages and the implementation of stabilization programs may have contributed to increasing wage inequality, particularly in the lower tail of the wage distribution. The findings suggest that minimum wages are not only a regulatory tool but also a reference point for wage negotiations, affecting both formal and informal sectors.