minimum wage
A minimum wage is a legal floor on pay: the law says no employer may pay a covered worker less than a set amount per hour (or per day or month). It is one of the most common and most argued-about labour policies in the world. The goal is straightforward and sympathetic — to lift the earnings of the lowest-paid workers and keep full-time work from leaving people in poverty.
In market terms, a minimum wage is a price floor placed in the labour market. The simplest textbook model warns of a catch: if the floor is set above the wage that supply and demand would otherwise reach, employers want fewer workers while more people want to work, so the model predicts some job losses among exactly the low-skilled workers the policy means to help. For example, a firm that would hire 10 workers at 8 dollars might hire only 8 at a mandated 12 dollars. That is the classic objection.
Reality, though, is genuinely contested, and this is one of the liveliest debates in economics. Many real-world studies of modest minimum-wage increases have found little or no measurable drop in employment, and sometimes other benefits (lower turnover, higher productivity, less poverty). Possible reasons include employer wage-setting power (monopsony), the boost to spending from higher-paid workers, and prices adjusting instead of jobs. The honest summary: a minimum wage clearly raises pay for those who keep their jobs; whether and how much it costs jobs depends on how high it is set relative to local wages, and economists still disagree. It is also a blunt tool — it can't tell a struggling family's earner from a teenager's first part-time job.
A city raises its minimum from 10 to 15 dollars. Cleaners and cashiers who keep their jobs take home much more. The fierce argument is over the side effects: do some lose hours or jobs, do prices rise, or does little change because employers had room to absorb it? Studies disagree, which is the whole debate in miniature.
A minimum wage clearly helps those who keep their jobs; the disputed question is its effect on the number of jobs.
Be wary of anyone who says the employment effect is obviously zero or obviously huge. The honest position is that modest increases seem to cost few jobs, but very high floors relative to local wages can; the evidence is mixed and context-specific.