Upload
chg211
View
17
Download
0
Tags:
Embed Size (px)
Citation preview
CraigPredict
Charlotte Gils
CraigPredict: craigpredict.info
How likely will your car sell within the next few days ?
How to improve your Craigslist posting to sell faster ?
2 / 6
Data: Craigslist Car PostingsScrape once daily, yields # days until sale.
3 / 6
Data AnalysisROC/AUC for probability of sale within d days using randomforest algorithm.
0.0 0.2 0.4 0.6 0.8 1.0False positive rate
0.0
0.2
0.4
0.6
0.8
1.0
Tru
e p
osi
tive r
ate
ROC Toyota Camry: Prob. of sale within d days
Mean CV ROC d =3 (AUC = 0.82) Mean CV ROC d =6 (AUC = 0.82) Mean CV ROC d =9 (AUC = 0.83) Mean CV ROC d =12 (AUC = 0.82) Mean CV ROC d =15 (AUC = 0.83)
4 / 6
Data Analysis IIMake suggestions for listing-specific features to improvelikelihood of sale.
0.00 0.02 0.04 0.06 0.08 0.10 0.12 0.14 0.16
Price#Sentences/#Words
Length DescriptionLexical Diversity
Odometer# Pictures
YearLength Title
LocationColor
Car TypePhone Yes/No
Map Yes/NoTransmission
CylindersDrive
Car StatusFuel
Feature Importances RF Honda Civic d=4
Feature Importances
5 / 6
About me
I Ph.D. in Computational PhysicsSwiss Federal Institute ofTechnology (ETH) Zurich
I Postdoc in Computational Biology,Mount Sinai Hospital, Toronto
I Software Developer (BusinessApplication)
I Lecturer (Mathematics),University of Saskatchewan
6 / 6