Another interesting line of research is that which examines women's mate preferences across the ovulatory cycle.
Over the period between 1912 and 1915, the Children's Bureau examined data across eight cities and nearly 23,000 live births.
She stopped to examine the airy tea room across the hall, which looks like an illustration from an English children's book.
His quantitative studies examined communicative dynamics among the members of organizations across various structures.
Landscape ecology - examines processes and relationship across multiple ecosystems or very large geographic areas.
Unlike most other studies, their work does not examine inequality among individuals, but rather differences in average income across counties.
"It is difficult for me to believe that 15 people, however qualified or energetic they may be, can examine problems across the continent," he said.
Generally, researchers examine the average levels of a trait (or multiple traits) across an entire culture to make comparisons cross-culturally.
The project's work, she points out, has included several studies designed to examine moral development across a wide sampling of economic and ethnic groups.
The colonel turned in his seat and examined the tops of the warehouses across the street.