<Li> Externalities--Economic growth may entail an increase in negative externalities that are not directly measured in GDP . Increased industrial output might grow GDP, but any pollution is not counted . </Li> <Li> Non-market transactions--GDP excludes activities that are not provided through the market, such as household production, bartering of goods and services, and volunteer or unpaid services . </Li> <Li> Non-monetary economy--GDP omits economies where no money comes into play at all, resulting in inaccurate or abnormally low GDP figures . For example, in countries with major business transactions occurring informally, portions of local economy are not easily registered . Bartering may be more prominent than the use of money, even extending to services . </Li> <Li> Quality improvements and inclusion of new products--by not fully adjusting for quality improvements and new products, GDP understates true economic growth . For instance, although computers today are less expensive and more powerful than computers from the past, GDP treats them as the same products by only accounting for the monetary value . The introduction of new products is also difficult to measure accurately and is not reflected in GDP despite the fact that it may increase the standard of living . For example, even the richest person in 1900 could not purchase standard products, such as antibiotics and cell phones, that an average consumer can buy today, since such modern conveniences did not exist then . </Li>

Which of these are components of gross domestic product (gdp) on the demand side