2019-06-11
Introduce research topic and question.
What is the relevance of the question?
Theory A (Aqda, Hamidi, & Rahimi, 2011).
Aqda et al. (2011) also posited Hypothesis D with preliminary Results B.
Theory B with Results X, Y, and Z (Angrist & Lavy, 2002).
Formulate hypothesis or set of hypotheses based on preliminary research.
How does the hypothesis connect with existing research? Integrate with literature review.
How will you test your hypothesis?
What research design will you employ? Based on your chosen research design, what relevant research methods will you apply?
Explain your choice of methods based on research design.
How will your methods test your hypothesis?
Dependent variable: | |||
wage | |||
(1) | (2) | (3) | |
tenure | 0.177*** | 0.198*** | 0.178*** |
(0.021) | (0.024) | (0.021) | |
exper | -0.022* | ||
(0.013) | |||
nonwhite | -0.517 | ||
(0.498) | |||
Constant | 4.991*** | 5.258*** | 5.043*** |
(0.185) | (0.243) | (0.192) | |
Observations | 526 | 526 | 526 |
R2 | 0.120 | 0.125 | 0.122 |
Adjusted R2 | 0.119 | 0.122 | 0.119 |
Note: | *p<0.1; **p<0.05; ***p<0.01 |
Model 1: \(\widehat{\text{wage}} = 4.99 + 0.18~\text{tenure}\)
Model 2: \(\widehat{\text{wage}} = 5.26 + 0.2~\text{tenure} -0.02 ~\text{exper}\)
Model 3: \(\widehat{\text{wage}} = 5.04 + 0.18~\text{tenure} -0.52 ~\text{nonwhite}\)
Despite the coefficient of exper
being statistically significant (\(p =\) 0.089) at the 10% level, the negative sign implies that each year of experience is associated with a decrease in 2 cents in average hourly earnings, holding all else constant. This counterinuitive result is most likely due to multicollinearity, as the correlation between tenure
and exper
is rather high (\(r =\) 0.499).
How does your collected evidence address your hypothesis?
In light of the evidence, how might you qualify the statements contained in your hypothesis?
What are the implications of your study?
Potential directions for future studies
Angrist, J., & Lavy, V. (2002). New Evidence on Classroom Computers and Pupil Learning. The Economic Journal, 112(482), 735–765. https://doi.org/10.1111/1468-0297.00068
Aqda, M. F., Hamidi, F., & Rahimi, M. (2011). The comparative effect of computer-aided instruction and traditional teaching on student’s creativity in math classes. Procedia Computer Science, 3, 266–270. https://doi.org/10.1016/j.procs.2010.12.045