Syöttölähtöanalyysi

Syöttölähtöanalyysi, or Input-Output Analysis, is an econometric method used to quantify the interdependencies between different sectors of an economy. Developed by Wassily Leontief, it models the flow of goods and services between industries. The core idea is that the output of one industry serves as an input for another, and vice versa.

The analysis is typically represented by an input-output table, which shows the monetary value of goods and services consumed by each industry and final demand. This table can be transformed into a matrix, where each element represents the amount of input from one sector required to produce one unit of output in another sector.

Using this matrix, economists can calculate the total direct and indirect requirements of inputs needed to meet a given level of final demand. For example, an increase in demand for cars will necessitate increased production not only in the automobile industry but also in steel, rubber, glass, and other supplier industries, and further down the supply chain.

Syöttölähtöanalyysi is valuable for economic planning, forecasting, and policy analysis. It helps policymakers understand the ripple effects of changes in one sector on the entire economy. It can be used to assess the economic impact of investments, trade policies, or technological advancements, and to identify bottlenecks or areas of high interdependence within the economy. However, it relies on static assumptions and requires detailed, up-to-date data, which can be a significant challenge.