11,748 rated or chosen profiles from 979 respondents, in up to 4 tasks of 3 profiles varying on 4 attributes.

About this table

Description	Online respondents in Spain and Portugal (Sept-Oct 2019) chose among two hypothetical conservation programs and a no-program status quo in 4 choice sets, varying the change in numbers of vulnerable, endangered and critically endangered waterbird species in SW Iberian coastal salt marshes and a one-time income-tax payment. 979 respondents; choice among three alternatives.
Reference	Oviedo, J. L., Campos, P., Caparrós, A., Muñoz Arroyo, G., & De la Cruz, A. (2026). Integrating threatened biodiversity in monetary ecosystem accounting: Choice experiments and simulated exchange values. Environmental and Resource Economics, 89(8).
DOI	10.1007/s10640-026-01102-4
Licence	CC BY 4.0
Source data	https://doi.org/10.5281/zenodo.21133199

Notes

Conjoint table (irw_conjoint). Discrete choice experiment: "Please, indicate the program that you would choose" PROGRAM A / PROGRAM B / NO PROGRAM; the status quo NO PROGRAM shows its fixed outcomes and is profile 3, so exactly one of three is chosen. Species-change text rebuilt from the coded levels with the questionnaire template (English version); tax amount as coded (displayed currency format unknown). Fixed blocked design. Spain and Portugal pooled (cov_country).

These notes describe the source data, which the IRW reproduces as released. All notes are listed on the Data Notes page.

Size and shape

Respondents	979
Rows (one per respondent, task and profile)	11,748
Tasks per respondent (most)	4
Profiles per task	3
Attributes	4
Tasks with no profile chosen	0

Design

Topic	climate energy environment
A profile represents	policy
Country	ES, PT
Language shown	unknown
Language of stored levels	en
Randomization restrictions	yes (stated by the source): Fixed blocked DCE design: only 30 distinct A/B profiles occur, A and B level counts mirror each other; the status-quo alternative (profile 3) always has the fixed status-quo levels (3/2/1 MORE species, tax 0). Generator and blocks not documented.
Task order	recorded in the deposit
Profile position	recorded in the deposit

Because the attribute levels were not randomized independently, an estimator has to account for the restriction; a plain difference in means across levels can mislead.

Outcomes:

choice	Please, indicate the program that you would choose [choice, forced]

Columns

attr_critically_endangeredattr_endangeredattr_taxattr_vulnerablechoicecov_countryidprofiletask

The layout (one row per respondent, task and profile; choice/rating outcomes; attr_ columns holding each attribute level as displayed) is defined in the IRW conjoint standard. What the outcomes asked is under Design above.

Get the data

Download CSVno account needed Browse on Redivisexplore and query Croissant metadataHugging Face, Kaggle, OpenML

Or load it directly in R or Python (both need a free Redivis account; the first call opens a browser to sign in):

# R
install.packages("remotes")
remotes::install_github("itemresponsewarehouse/Rpkg")
library(irw)
df <- irw_fetch("oviedo_2026_waterbirds", source = "conj")

# Python
pip install irw

import irw
df = irw.fetch("oviedo_2026_waterbirds", source="conj")

How to cite

@article{Oviedo_2026, title={Integrating Threatened Biodiversity in Monetary Ecosystem Accounting: Choice Experiments and Simulated Exchange Values}, volume={89}, ISSN={1573-1502}, url={http://dx.doi.org/10.1007/s10640-026-01102-4}, DOI={10.1007/s10640-026-01102-4}, number={8}, journal={Environmental and Resource Economics}, publisher={Springer Science and Business Media LLC}, author={Oviedo, Jose L. and Campos, Pablo and Caparrós, Alejandro and Arroyo, Gonzalo M. and De La Cruz, Andrés}, year={2026}, month=July }

Version and provenance

IRW version	v584
Redivis dataset	irw_conjoint v4.2
Redivis dataset DOI	10.57761/qkye-q530
Manifest pin for this IRW version	v4.2
Metadata source	irw_meta v44.0