Getting to the bottom of a subject

Every year, the Observatory publishes six sector studies of thirty to sixty pages. Each explores a segment, a region or a theme in depth: price formation, restitutions, online sales, the tribal art market.
They rely on the Observatory's data, enriched by interviews, surveys and legal analyses. They are reviewed by outside experts and published with their data.
This page presents the method, the calendar and recent studies.
Sector studies in figures
Source: OIMAP Observatory.
A five-step method
The subject is chosen by the scientific council, after consulting users. A lead analyst draws up a plan, collects the data, conducts interviews and writes the study. Two outside reviewers, specialists in the subject, give their comments.
The study is then finalised, published with its statistical annexes, and presented at a public seminar. Participants can ask questions and suggest follow-ups.



A few recent studies
The study on the certification premium showed that lots accompanied by an OIMAP certificate sell on average 7% higher. The one on online sales highlighted the rise of buyers from Asia-Pacific. The study on restitutions analysed 847 cases since 2012.
Other studies cover the tribal art market after restitutions, price guarantees in major sales and the conservation conditions of works on paper. All are freely accessible.
Studies and training
The sector studies serve as course materials in many universities and schools. The Observatory provides teachers with teaching sheets, ready-to-use datasets and corrected exercises.
Students can also find dissertation and thesis topics there. An annual research grant supports three works using the Observatory's data.
Recent studies
| Fineness | Year | Pages | Theme |
|---|---|---|---|
| The certification premium | 2024 | 46 | Prices and trust |
| Online sales in Asia-Pacific | 2024 | 38 | Regions |
| Restitutions: a twelve-year review | 2023 | 58 | Heritage |
| Price guarantees and major sales | 2023 | 34 | Operators |
| Preserving works on paper | 2022 | 30 | Conservation |
Landmarks
- Choice of subject
Scientific council.
- Collection
Data and interviews.
- Writing and review
Outside reviewers.
- Publication
Public seminar.
Suggesting a subject
Public study or tailor-made study

Public study
Chosen by the council- Free
- Open data
- Published on a fixed date
For everyone.

Tailor-made study
Commissioned by a client- Invoiced at cost
- Defined scope
- Published after six months
For specific needs.



Following a study from start to finish
- Announcement
Annual programme.
- Consultation
Contributions from users.
- Publication
Going online.
- Seminar
Public presentation.
- Follow-up
Feedback and corrections.
Making good use of a study
A researcher

« The sector studies are a first-rate source. They contain what no commercial report publishes: the method and the data. »
Vocabulary of studies
- Certification premium
- Price difference linked to a certificate.
- Price guarantee
- Commitment by a house to the seller.
- Outside reviewer
- Expert independent of the Observatory.
- Seminar
- Public presentation meeting.
Frequently asked questions
Are the studies free?
Yes.
Can the data be obtained?
Yes, attached to each study.
How can I suggest a subject?
Through the contact form.
Where can I see the full list?
In the publications archives.
Useful documents
Contacts

Download the data
Image credits (16)
- Qur'an Manuscript Folio (800s) — Cleveland Museum of Art, CC0 1.0
- Leaf from a Lectionary with St. Luke (1057–1063) — Cleveland Museum of Art, CC0 1.0
- Qur'an Manuscript Folio (recto; verso); Left side of Bifolio (800s) — Cleveland Museum of Art, CC0 1.0
- Mercury (Budha), from a Mandi Astrology Series, Sanju (c. 1810) — Cleveland Museum of Art, CC0 1.0
- Missale: Fol. 185v: Crucifixion with borders (full page), Bartolommeo Caporali (1469) — Cleveland Museum of Art, CC0 1.0
- Woman Sitting Reading , Georges Lemmen (1905) — Cleveland Museum of Art, CC0 1.0
- Hours of Queen Isabella the Catholic, Queen of Spain, Master of the First Prayerbook of Maximillian (c. 1500) — Cleveland Museum of Art, CC0 1.0
- Chemin de fer de Toulouse à Bayonne. Pont de l'Aran (en trois arches de 17m d'ouverture chacune). Situation des travaux au 21 juillet 1861, Édouard Baldus (1861) — Cleveland Museum of Art, CC0 1.0
- Leaf from a Psalter and Prayerbook: Calendar Page with Labors (recto) and Calendar Page with Peasant (verso) (c. 1524) — Cleveland Museum of Art, CC0 1.0
- High Class Students and Teachers at Bishop Cotton School, Shimla (verso), Raja Deen Dayal (c. 1882–87) — Cleveland Museum of Art, CC0 1.0
- St. Catherine of Siena and the Beggar, Giovanni di Paolo (1460s) — Cleveland Museum of Art, CC0 1.0
- A Palace with an Arched Bridge (A Roman Villa), Hubert Robert (1760) — Cleveland Museum of Art, CC0 1.0
- Seal Color Box (1662–1722) — Cleveland Museum of Art, CC0 1.0
- Illuminated Opening Page Titled Laila and Majnun from a Khamsa (Quintet) of Nizami of Ganja, Ja'far Baisunghuri (835 AH/1431–32 CE) — The Metropolitan Museum of Art, CC0 1.0
- Bookplate: Boylston Medical Library, George Girdler Smith (1806–39) — Cleveland Museum of Art, CC0 1.0
- The Triumph of Mordecai, Lucas van Leyden (1515) — Cleveland Museum of Art, CC0 1.0
Cleveland Museum of Art · CC0 1.0
Studies and publicationsAnalysis notes, sector studies and databases of the OIMAP Observatory, in open access.›
Analysis notesThe Observatory's monthly notes: index news, major sales, regulation and reading of trends.›
DatabasesThe Observatory's open databases: series, formats, API, dictionary of variables and licence.›