Description Usage Arguments Details Value Examples
Calculation of pathway values, defined as the difference between residuals of full model and reduced model lacking the pathway variable. The larger the difference, the more a case qualifies as a pathway case suitable for the analysis of mechanisms.
1 | pathway(full_model, reduced_model)
|
full_model |
Full model including covariate of interest (= pathway variable) |
reduced_model |
Reduced model excluding covariate of interest |
The difference between the absolute residuals of the full and reduced model follows the approach developed by Weller and Barnes (2014): Finding Pathways: Mixed-Method Research for Studying Causal Mechanisms. Cambridge: Cambridge University Press. https://doi.org/10.1017/CBO9781139644501).
The calculation of the absolute difference between the full-model and reduced-model residuals, given a case's reduced-model residual is larger than its full-model residual, follows the proposal by Gerring (2007): Is There a (Viable) Crucial-Case Method? Comparative Political Studies 40 (3): 231-253. https://journals.sagepub.com/doi/10.1177/0010414006290784)
A dataframe with
- all full model variables,
- full model residuals (full_resid
),
- reduced model residuals (reduced_resid
),
- pathway values following Weller/Barnes (pathway_wb
),
- pathway values following Gerring (pathway_gvalue
),
- variable showing whether Gerring's criterion for a pathway
case is met (pathway_gstatus
)
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