Category Archives: Uncategorized

Estimating Uber Driver Pay, Net of Expenses: $12.76 in Boston

[Note: there is now an updated version of the study, with slightly different hourly wage reported in Table 6. I’ve updated my post to reflect that, and attached a new version of the spreadsheet. 2/5/15] Uber just put out a … Continue reading

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Reasons for Replication in HCI Research

At the CHI conference last week, Max Wilson organized the RepliCHI workshop (I helped a little, but really it was Max). There were a bunch of presentations reflecting on the challenges of doing replication work, and lots of discussion about … Continue reading

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Personalized Filters Yes; Bubbles No

On Thursday, I gave the closing keynote for the UMAP conference (User Modeling and Personalization) in Girona, Spain (Catalunya). I had planned to talk about by work directed towards creating balanced news aggregators that people will prefer to use over … Continue reading

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Yelp gets more reviews per reviewer than CitySearch or Yahoo Local

Author attributes it to the fact that reviewers are anonymous at CitySearch and Yahoo local, but build up reputations on Yelp. Of course, there are also other differences between the sites. Zhongmin Wang (2010) “Anonymity, Social Image, and the Competition … Continue reading

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Need recommender systems contest ideas

Do you have an idea or plan for a future challenge/contest that you think could move the field of Recommender Systems forward? I’d love to hear about your idea or plan, even if only in sketch form, and even if … Continue reading

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Gerhard Fischer paper at C&T

“Towards an Analytic Framework for Understanding and Supporting Peer-Support Communities in Using and Evolving Software Products” at C&T Participation in SAP’s online community. Before/After point system introduced in SAP: Mean response time decreased (51 min vs. 34 min.) Mean helper … Continue reading

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Karim Lakhani at C&T

Karim Lakhani is giving a great keynote at C&T about tracking innovation. He has worked with MatLab programming contests that have a fascinating format. There’s clear performance outcome; source code of all entries is available to other people; leaders are … Continue reading

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