Cross-sectional data, or a cross section of a study population, in statistics and econometrics is a type of data collected by observing many subjects (such as individuals, firms, countries, or regions) at the same point of time, or without regard to differences in time. Analysis of cross-sectional data usually consists of comparing the differences among the subjects.

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  • Cross-sectional data, or a cross section of a study population, in statistics and econometrics is a type of data collected by observing many subjects (such as individuals, firms, countries, or regions) at the same point of time, or without regard to differences in time. Analysis of cross-sectional data usually consists of comparing the differences among the subjects. For example, if we want to measure current obesity levels in a population, we could draw a sample of 1,000 people randomly from that population (also known as a cross section of that population), measure their weight and height, and calculate what percentage of that sample is categorized as obese. This cross-sectional sample provides us with a snapshot of that population, at that one point in time. Note that we do not know based on one cross-sectional sample if obesity is increasing or decreasing; we can only describe the current proportion. Cross-sectional data differs from time series data, in which the same small-scale or aggregate entity is observed at various points in time. Another type of data, panel data (or time-series cross-sectional (TSCS) data, or longitudinal data), combines both cross-sectional and time series data ideas and looks at how multiple subjects (firms, individuals, etc.) change over time. Panel analysis uses panel data to examine changes in variables over time and differences in variables between the subjects. In a rolling cross-section, both the presence of an individual in the sample and the time at which the individual is included in the sample are determined randomly. For example, a political poll may decide to interview 1000 individuals. It first selects these individuals randomly from the entire population. It then assigns a random date to each individual. This is the random date that the individual will be interviewed, and thus included in the survey. Cross-sectional data can be used in cross-sectional regression, which is regression analysis of cross-sectional data. For example, the consumption expenditures of various individuals in a fixed month could be regressed on their incomes, accumulated wealth levels, and their various demographic features to find out how differences in those features lead to differences in consumer behavior. (en)
  • En statistiques et en économétrie, on appelle données en coupe ou données transversales des données pour lesquelles on observe les unités statistiques à une date donnée. (fr)
  • Dados de corte transversal ou cross-section são uma amostra de dados usados em estatística ou econometria, sejam individuos, consumidores, empresas, cidades, etc., em um dado ponto no tempo.Apesar de alguns dados, em algumas situações, não corresponderem precisamente ao mesmo período de tempo, em uma análise de corte transversal tais diferenças de tempo que não possuem grande significância, são ignorados. Uma importante característica desta análise, é que o uso de uma amostragem aleatória da população subjacente não se faz apropriada. Por exemplo: Se estivéssemos interessados em descobrir algo como a quantidade de pessoas que declaram 100% de sua fortuna, de uma determinada amostragem aleatória de mil pessoas, as mais ricas poderiam optar por não revelar tal informação, fazendo com que com que tal amostra resultante não se caracterizasse em uma amostra aleatória. (pt)
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http://purl.org/linguistics/gold/hypernym
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  • En statistiques et en économétrie, on appelle données en coupe ou données transversales des données pour lesquelles on observe les unités statistiques à une date donnée. (fr)
  • Cross-sectional data, or a cross section of a study population, in statistics and econometrics is a type of data collected by observing many subjects (such as individuals, firms, countries, or regions) at the same point of time, or without regard to differences in time. Analysis of cross-sectional data usually consists of comparing the differences among the subjects. (en)
  • Dados de corte transversal ou cross-section são uma amostra de dados usados em estatística ou econometria, sejam individuos, consumidores, empresas, cidades, etc., em um dado ponto no tempo.Apesar de alguns dados, em algumas situações, não corresponderem precisamente ao mesmo período de tempo, em uma análise de corte transversal tais diferenças de tempo que não possuem grande significância, são ignorados. (pt)
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  • Cross-sectional data (en)
  • Données en coupe (fr)
  • Dados de corte transversal (pt)
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