Some countries further differentiate the minimum wage by sector/occupation (e.g. Japan and Mexico) and lower rates are sometimes set for workers on training/apprenticeships, and for disabled workers. By contrast, in a small countiy like Latvia, there are considerable practical difficulties of introducing geographic differentiation of minimum wages. These difficulties, combined with the large regional wage disparities in Latvia, underline the need to exercise great caution when deciding on across-the-board minimum-wage adjustments, in order to avoid negative employment effects especially in lagging regions. More widespread collective bargaining would ensure better representation of worker interests in the wage setting process and remuneration in line with productivity for a larger number of workers.