In the context of human resource, liabilities include the very young people (below 15) and old people (over 60) who cannot work and have, therefore, to be supported by the productive workforce. It also includes people between 15 and 60 who, due to lack of skills and capabilities, cannot engage in productive work.
Assets include people between 15 and 60 who are sufficiently educated, healthy and skilled to contribute productively to the economy.