The evidence is in: Patron Driven Acquisition Promotes Collection Use Jason Price & John McDonald Claremont University Consortium SCELC Colloquium - March.

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Presentation transcript:

The evidence is in: Patron Driven Acquisition Promotes Collection Use Jason Price & John McDonald Claremont University Consortium SCELC Colloquium - March 2, 2011 (with thanks for data & discussion from Kari Paulson & Alison Morin of EBL)

Bananas tipped the boat: a cautionary tale Early patron-driven deal with a major platform Assignment on economics of banana plantations UC Boulder ‘bought every book with banana in the title’ Used by librarians & vendors(!) as evidence that user-driven selection is a bad idea

Patron-driven model objections: cautionary conclusions? Books will be selected based on click-thrus that don’t indicate interest Users will select ebooks that no one (else) is interested in User selected collections will be unbalanced turkeys

Definitions Purchase type Patron selected = Demand Driven = User-selected Librarian selected ≈ Library selected ≈ Pre-selected Ebook usage was measured conservatively Data reflects post-purchase use –Did not count uses that lead to user-selection ‘Casual’ use eliminated –1 use ≈ 1 ‘read online’ ≈ 1 ‘download’ –read online = >10 min w/click thru OR copy OR print Transaction level data –each use recorded separately with user anonymously identified

Questions we’ll address 1.Are user-selected ebooks used less often than pre-selected ebooks? 2.Do user-selected ebooks have a narrower audience? 3.Are user-selected collections less balanced? Do we have anything to fear in patron-driven selection? (Can we use this to build better acquisition models?)

Scope of the overall dataset 1 Ebook Vendor – EBL (Ebook Library) 11 Libraries 28,327 ebooks bought from ,887 uses during that period Purchase Models: User Selection, Pre- Selection, or Mixed

Total Books & Usage LibraryModel User- Selected Pre- Selected Usage by Download Usage Read Online AMIX BMIX CUSER DUSER EMIX FPRE GPRE HUSER IMIX JUSER KMIX TOTAL 19,8318,49685,983126,904

Total Books & Usage LibraryModel User- Selected Pre- Selected Usage by Download Usage Read Online AMIX BMIX CUSER DUSER EMIX FPRE GPRE HUSER IMIX JUSER KMIX TOTAL 19,8318,49685,983126,904

Total Books & Usage LibraryModel User- Selected Pre- Selected Usage by Download Usage Read Online AMIX BMIX CUSER DUSER EMIX FPRE GPRE HUSER IMIX JUSER KMIX TOTAL 19,8318,49685,983126,904

Total Books & Usage LibraryModel User- Selected Pre- Selected Usage by Download Usage Read Online AMIX BMIX CUSER DUSER EMIX FPRE GPRE HUSER IMIX JUSER KMIX TOTAL 19,8318,49685,983126,904

Scope of this analysis 5 Mixed-model libraries Design –Test variables: Purchase type & Library –Response variables: Uses per year Unique users per year Books owned more than 6 months Inferential stats: Negative binomial regression (not shown), ANOVA

Question 1 1.Are user-selected ebooks used less often than pre-selected ebooks? 2.Do user-selected ebooks have a narrower audience? 3.Are user-selected collections less balanced?

Librarian Acquired

Question 2 1.Are user-selected ebooks used less often than pre-selected ebooks? 2.Do user-selected ebooks have a narrower audience? 3.Are user-selected collections less balanced?

User-selected collections have fewer unused titles

Question 3 1.Are user-selected ebooks used less often than pre-selected ebooks? 2.Do user-selected ebooks have a narrower audience? 3.Are user-selected collections less balanced?

User-selected collections have similar subject profiles User Pre User Pre User Pre User Pre User Pre Proportion of individual collection Library

User-selected collections have similar LC profiles Blue = User selected Green = Pre selected

User-selected collection have similar YBP Content Levels

Patron vs. Librarian: Content Level Shen et al ER&L Conference Head first into the PDA Pool…

User-selected collections have similar YBP select ratings

Patron vs. Librarian: YBP Select Shen et al ER&L Conference Head first into the PDA Pool…

Summary 1.Are user-selected ebooks used less often than pre- selected ebooks? No. User-selected ebooks are used 2-5x more often 2.Do user-selected ebooks have a narrower audience? No. User-selected ebooks are used by 2-3x more unique users 3.Are user-selected collections less balanced? No. User selected collections are similarly balanced.

Questions & Discussion Given our results – what do we still have to fear from patron-driven purchasing (at least in the EBL model)?

Thanks! Jason Price John McDonald For more detail see: