Examlex
If a country is producing efficiently and is on the production possibilities frontier,the only way to produce more of one good is with an advance in technology.
Triangulation
The use of multiple methods or data sources in research to improve the accuracy and validity of results by cross-verifying findings.
Ethnography
A qualitative research method focused on studying cultures, practices, and communities through observation and participation.
Sociometry
A quantitative method for measuring social relationships, used to identify the structure of groups and the position of individuals within them.
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