craigpredict: demo slides

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 ?

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Data: Craigslist Car PostingsScrape once daily, yields # days until sale.

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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

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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)

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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

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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

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