getAPEs with more than 2 high-dimensional fixed effects

[tcsimmons]

While using getAPEs to calculate the fixed effects of the model, I've noticed that "getAPEs' currently only supports logit and probit models" error always shows up whenever I have more than 2 high-dimensional fixed effects in the model. I looked through the code and found that this is indeed part of the function. You can see from the following code, copied directly from the function, that any model with "lvls.k" not equal to 2 will throw an error:

if (panel.structure == "classic") { if (object[["family"]][["family"]] != "binomial" | !(object[["family"]][["link"]] %in% c("logit", "probit")) | length(object[["lvls.k"]]) != 2L) { stop(paste("'getAPEs' currently only supports logit and probit models.")

Maybe I just don't understand the background here, but I was also reading in the package reference manual and found the following line which suggests that the function should apply for all covariates in the model and never stipulates the limitation on number:

"getAPEs is a post-estimation routine that can be used to estimate average partial effects with respect to all covariates in the model and the corresponding covariance matrix."

Can you help me understand why there's a limitation on calculating average partial effects with respect to the number of covariates placed in the model?

[amrei-stammann]

Hi,

getAPEs() currently only works for logit and probit models, either with two-way fixed effects (in a classical panel structure, see https://cran.r-project.org/web/packages/alpaca/vignettes/howto.html) or with three-way fixed effects (in a network panel structure, see https://cran.r-project.org/web/packages/alpaca/vignettes/trade.html). You are right, the error message should be more informative. The limitation is mainly due to the computation of the standard errors. We are currently working on extensions.

Best, Amrei

[tcsimmons]

This makes sense. Thank you for your reply!

-Trent

From: Amrei Stammann notifications@github.com Sent: Tuesday, July 21, 2020 1:27 AM To: amrei-stammann/alpaca alpaca@noreply.github.com Cc: Trent Simmons Trent.Simmons@doj.ca.gov; Author author@noreply.github.com Subject: Re: [amrei-stammann/alpaca] getAPEs with more than 2 high-dimensional fixed effects (#11)

Hi,

getAPEs() currently only works for logit and probit models, either with two-way fixed effects (in a classical panel structure, see https://cran.r-project.org/web/packages/alpaca/vignettes/howto.htmlhttps://urldefense.proofpoint.com/v2/url?u=https-3A__cran.r-2Dproject.org_web_packages_alpaca_vignettes_howto.html&d=DwMCaQ&c=uASjV29gZuJt5_5J5CPRuQ&r=-line2TQISaNSw8moqUIlTGqExYKtqVIQI-szQBNvJ8&m=8B_xlbqjZiTXeqKA1I4n8YZdApfA7BIU4M24W5C2wKg&s=OGv-9zsxZCfrosH25W-6EGJhHUjshLLmH4GVc5FPsA0&e=) or with three-way fixed effects (in a network panel structure, see https://cran.r-project.org/web/packages/alpaca/vignettes/trade.htmlhttps://urldefense.proofpoint.com/v2/url?u=https-3A__cran.r-2Dproject.org_web_packages_alpaca_vignettes_trade.html&d=DwMCaQ&c=uASjV29gZuJt5_5J5CPRuQ&r=-line2TQISaNSw8moqUIlTGqExYKtqVIQI-szQBNvJ8&m=8B_xlbqjZiTXeqKA1I4n8YZdApfA7BIU4M24W5C2wKg&s=ykTFV6-7KqYpHvVr0UZufveTexRgIp6y30Aj4l01Yq8&e=). You are right, the error message should be more informative. The limitation is mainly due to the computation of the standard errors. We are currently working on extensions.

Best, Amrei

— You are receiving this because you authored the thread. Reply to this email directly, view it on GitHubhttps://urldefense.proofpoint.com/v2/url?u=https-3A__github.com_amrei-2Dstammann_alpaca_issues_11-23issuecomment-2D661713475&d=DwMCaQ&c=uASjV29gZuJt5_5J5CPRuQ&r=-line2TQISaNSw8moqUIlTGqExYKtqVIQI-szQBNvJ8&m=8B_xlbqjZiTXeqKA1I4n8YZdApfA7BIU4M24W5C2wKg&s=fdDYpRPfvUlUqsD2dwIfX_u88ZgafbfBrESfxDd8iiw&e=, or unsubscribehttps://urldefense.proofpoint.com/v2/url?u=https-3A__github.com_notifications_unsubscribe-2Dauth_AOHGCV47RC5KHXKREVKA3B3R4VGMDANCNFSM4PCMGWBA&d=DwMCaQ&c=uASjV29gZuJt5_5J5CPRuQ&r=-line2TQISaNSw8moqUIlTGqExYKtqVIQI-szQBNvJ8&m=8B_xlbqjZiTXeqKA1I4n8YZdApfA7BIU4M24W5C2wKg&s=Jvs_24QbhnQG09wte8NvubCJuBHCmxo1h0VwdBNBie0&e=.

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