The relationship between income and health is not fully understood. In theory, income could not only provide access to preventive care and a healthy lifestyle that can help to prevent disease, but also provide access to unhealthy consumption goods such as tobacco and alcohol which raise the risk...

Simple sum monetary aggregates are based on accounting conventions and have no aggregation theoretic foundations in economic theory. In contrast, Divisia monetary aggregates are directly derived from aggregation and index number theory. Credit card services cannot be included in simple sum...