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Assignment Overview: Understanding Experimental Designs in Social Science Research

September 23, 2023
Brittany Hill
Brittany Hill
🇺🇸 United States
Statistics
Brittany Hill, PhD in Statistics from Saint Leo University with 12+ years of expertise, specializes in aiding students with assignments. Unveiling complex statistical concepts, Brittany facilitates comprehensive learning and academic success.
Key Topics
  • Problem Description:
  • Randomized Controlled Experiment vs. Quasi-Experiment:
  • Assessing Learning in Multi-Age, Multi-Grade Classrooms:
    • Examining Minimum Wage Increases in the Fast-Food Industry:
    • Main Findings of Card and Krueger (1994):
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From the fundamental distinctions between randomized controlled experiments and quasi-experiments to practical applications in assessing learning environments and scrutinizing economic phenomena, this assignment aims to demystify the methodologies that underpin rigorous research. Join us as we navigate through the nuances of experimental designs, unraveling the complexities that shape our understanding of causality and evidence in the realm of social sciences.

Problem Description:

The assignment on experimental design delves into the intricacies of experimental designs in social science research, focusing on the distinctions between randomized controlled experiments (RCTs) and quasi-experiments. It explores their applications, advantages, and limitations, using real-world scenarios to illustrate each concept.

    Randomized Controlled Experiment vs. Quasi-Experiment:

  • Overview:Highlighting the core disparities between RCTs and quasi-experiments, emphasizing randomization, control over variables, establishment of causality, and generalizability.
  • Summary:Concluding that while RCTs are the gold standard for causal relationships, quasi-experiments offer utility in situations where randomization is impractical or unethical.

Assessing Learning in Multi-Age, Multi-Grade Classrooms:

  • Experimental Design:Outlining steps for a randomized controlled trial to assess learning effects in a multi-age, multi-grade classroom setting, emphasizing the importance of randomization.
  • Threats to Validity: Identifying potential internal and external validity threats, proposing mitigation strategies, and underlining the significance of replication for external validity.

Examining Minimum Wage Increases in the Fast-Food Industry:

  • Research Question: Exploring the impact of minimum wage increases on employment levels in the fast-food industry, particularly in New Jersey compared to Pennsylvania.
  • Methodology:Detailing the natural experiment approach using a difference-in-differences (DD) estimation, including control group selection and robustness checks.
  • Quasi-Experimental Nature:Emphasizing that the study is a quasi-experiment due to the absence of random assignment, utilizing the natural experiment of wage changes in two neighboring states.
  • DD Estimation Technique:Clarifying the use of DD estimation as a quasi-experimental method to estimate causal effects when a randomized controlled trial is unfeasible.

Main Findings of Card and Krueger (1994):

  • Key Results:Summarizing the study's major findings that challenge traditional economic theories on minimum wage increases, revealing positive effects on wages without negative impacts on employment.
  • Robustness Checks: Highlighting the validity of findings through robustness checks, exploring effects on different worker subgroups and restaurant types.
  • Overall Implications:Concluding that the study suggests a nuanced relationship between minimum wage increases and employment levels, challenging conventional economic wisdom.

By restructuring the content, the assignment becomes more digestible, providing a clearer understanding of the research concepts and their practical applications in social science experimentation.

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