Most of what will happen in Latvia in 2040 is already written into today. How many people will be of working age is set by those already born. What pensions will cost is set by contributions already made. What power plants will emit is set by those already under construction. Quantities like these have inertia. They change slowly, and a decision taken today becomes visible after five, ten or twenty years.
That is why the question on this site is always "what happens over fifteen years", not "what will happen next year". The model follows these slow quantities year by year, and follows how they affect one another. Some of these effects form a circle. Fewer people in work means a slower economy, a slower economy means more emigration, more emigration means fewer people in work still. That is a reinforcing loop. Other effects correct themselves. When there are suddenly more people who want to work, wage growth slows until firms take them on. That is a balancing loop. On every question page the section "What drives it" says which of these is the main one for that question, or that the main thing is not a circle at all but one assumption.
Two features of the base path run through every page, and both come from the labour market. The first is a slump in the 2030s. The workforce shrinks, retirements open posts faster than they can be filled, wages rise by 2030, and the economy cools in the middle of the decade before it recovers. How deep that slump is rests on three judgements with no Latvian record behind them: how easily firms replace workers with equipment, how long they take to open the posts they want, and how many of the posts that departures leave are advertised again. The second is absorption. When a policy adds people who want to work, the model employs about three-quarters of them within two decades and reports the rest as unemployment, because capital and demand take time to grow with the workforce. The European Commission's Ageing Report assumes, by convention, that all of them work. Every employment figure on the site is read with that in mind.
The result on every page is a base path, that is, what happens if nothing changes, and several packages that change one or more policies from 2028. The difference between a package and the base path is what the policy delivers and what it costs. Costs to the budget are shown in two ways, because Latvia's public finances are bound by the European Union's fiscal rules. First, a package's own effect on the budget. Second, what is left of it in government debt once the rules have responded, which is usually much less. A package that spends is mostly paid for by cuts the rule forces elsewhere, and a package that earns mostly lets the rule cut less. It is a calculation, not a forecast. It shows where today's assumptions lead, and every page names the assumptions its answer rests on most.