The article examines wage differences between part-time and full-time workers in Spain, focusing on gender differences. The researchers used a large dataset and a special method to break down wage gaps by different levels of wages. They found that part-time female workers in Spain earn less due to factors like lower education and being in lower-paying sectors, while part-time male workers also face a wage penalty, especially in lower-paying jobs. This study shows that part-time work affects males and females differently in Spain, with men facing a higher penalty, particularly those with lower qualifications, and women with higher qualifications.