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Bacterial generation time, the period required for a bacterial population to double during its exponential growth phase, serves as a critical measure of microbial growth dynamics under optimal conditions. This parameter varies significantly across bacterial species and can be influenced by factors such as temperature, pH, and the availability of nutrients. For example, Escherichia coli can achieve a generation time of approximately 20 minutes, while Mycobacterium tuberculosis exhibits a much...
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Are generations a useful concept?

David P Costanza1, Cort W Rudolph2, Hannes Zacher3

  • 1Organizational Sciences and Communication, The George Washington University, 600 21st St NW #201, Washington, DC 20052, USA.

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|October 23, 2023
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Summary
This summary is machine-generated.

Generational differences lack scientific evidence, with observed effects often due to age or period, not distinct generations. The concept of "generationalism" relies on stereotypes rather than objective data.

Keywords:
Age, period, cohortGenerationsSocial constructionism, lifespan theory

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Area of Science:

  • Organizational behavior
  • Social psychology
  • Human resource management

Background:

  • Generations are widely discussed but lack empirical support.
  • Popularly defined generations (e.g., Millennials) are not objectively quantifiable.
  • Observed differences are often misattributed to generational membership.

Purpose of the Study:

  • Review the scientific evidence on generations.
  • Address the gap between scientific findings and popular beliefs.
  • Explore alternative explanations for perceived generational effects.

Main Methods:

  • Literature review of generational research.
  • Analysis of age, period, and cohort effects.
  • Examination of lifespan theory and social constructionism.

Main Results:

  • No convincing evidence supports the existence of distinct, popularly defined generations.
  • Empirical differences are better explained by age and period effects.
  • Generationalism, or stereotyping based on generation, is prevalent but unsupported.

Conclusions:

  • Generations as commonly conceptualized do not exist in objectively quantifiable ways.
  • Age and period effects are more plausible explanations for observed differences.
  • Rethinking generational assumptions is crucial for diversity, equity, and inclusion initiatives.