jhelvy

Assistant Professor in EMSE @ GWU; Engineering; Sustainability; Technology Innovation Policy; EVs; China; Data Science; Rstats; Python; Swing dancing

George Washington UniversityWashington, D.C.

Pinned Repositories

cbcTools
R package of comprehensive tools for designing and analyzing choice-based conjoint (cbc) experiments
Language:R9 3 325
distillery
A distill blog and showcase about building distill websites and blogs!
Language:HTML44 2 4131
jhelvy_quarto
Source files for my personal website, built using Quarto and deployed with Netlify
Language:R13 1 05
kyria_3d_cases
24 4 03
logitr
Fast estimation of multinomial (MNL) and mixed logit (MXL) models in R with "Preference" space or "Willingness-to-pay" (WTP) space utility parameterizations in R
Language:R56 7 4116
renderthis
An R package for building xaringan slides into multiple outputs, including html, pdf, png, gif, pptx, and mp4.
Language:HTML180 2 6012
splitKbCompare
An interactive tool for comparing layouts of different split mechanical keyboards
Language:R323 10 8530
stanTuneR
This code uses the algebra solver in Stan (https://mc-stan.org/) to find the parameters of a distribution that produce a desired tail behavior.
Language:R29 1 01
wireless-corne
Build log and photo gallery for my Wireless Corne keyboard
58 5 23
surveydown
Markdown-Based, Programmable Surveys Using R, Quarto, Shiny, and PostgreSQL
Language:R143 4 4318

jhelvy's Repositories

jhelvy/splitKbCompare
An interactive tool for comparing layouts of different split mechanical keyboards
Language:R323 10 8530
jhelvy/logitr
Fast estimation of multinomial (MNL) and mixed logit (MXL) models in R with "Preference" space or "Willingness-to-pay" (WTP) space utility parameterizations in R
Language:R56 7 4116
jhelvy/jhelvy_quarto
Source files for my personal website, built using Quarto and deployed with Netlify
Language:R13 1 05
jhelvy/cbcTools
R package of comprehensive tools for designing and analyzing choice-based conjoint (cbc) experiments
Language:R9 3 325
jhelvy/charts
A repo of reproducible charts
Language:HTML7 2 03
jhelvy/cv
My CV, generated using R, Quarto, and a Googlesheet
Language:R7 1 04
jhelvy/magaScreener
Document screening tool for identifying MAGA-targeted keywords
Language:JavaScript5
jhelvy/potus-econ-scorecard
Language:JavaScript51
jhelvy/2025-posit-conf-surveydown
Slides for my talk on surveydown at the 2025 posit::conf
Language:JavaScript3
jhelvy/2025-surveydown-workshop
Workshop on using surveydown to build surveys
Language:JavaScript2
jhelvy/jhelvy.github.io
Language:HTML1 2 0
jhelvy/smartcharging
Language:HTML1 2 01
jhelvy/2025-btr7-ev-spatial
Language:JavaScript
jhelvy/2025-jeffries-us-china-summit
Language:JavaScript
jhelvy/2025-snowmass
Slides for my presentation at the 2025 Snowmass conference
Language:JavaScript
jhelvy/2025-ucsd-us-china
Language:JavaScript
jhelvy/assess
Package for grading assignments - this is something I use for my classes, so it's highly bespoke
Language:R1 0
jhelvy/autocango
Scraped China market vehicle specifications data from www.autocango.com
Language:HTML
jhelvy/ev_range
Language:HTML
jhelvy/good_model_docs
Source code for the GOOD model documentation website
Language:CSS1 0
jhelvy/jhelvy
Welcome to John Paul Helveston's GitHub!
2 0
jhelvy/leaf
Language:HTML1 0
jhelvy/logitr-cars
Examples for designing a conjoint survey and analyzing results in R
Language:R1 0
jhelvy/oica
Language:R1 0
jhelvy/research-overview
Slides of a brief introduction to some of my research
Language:JavaScript
jhelvy/rweekly.org
R Weekly
Language:R0 0
jhelvy/slides-old
Slides for talks I've given in the past
Language:HTML
jhelvy/smart-charging-preferences-2025
Replication code and data for our study on BEV owner smart charging preferences
Language:R
jhelvy/testing
jhelvy/us-china-pev-policy-2025
Language:HTML