5,492 rated or chosen profiles from 229 respondents, in up to 12 tasks of 2 profiles varying on 2 attributes.

About this table

Description	Bean farmers in north-western Nicaragua (2017 field days, n = 229) made 12 incentivized choices between two 1-lb bags of bean seed, identified only by the symbol of the blind field plot they came from (circle, square, triangle) and priced C$14-34, or neither; one choice was enforced.
Reference	Maredia, M. K., Posey, S., Reyes, B., Shupp, R., et al. (2020). Farmer willingness to pay for quality bean seeds: Data, tools and methods used in the field experiments conducted in Nicaragua, 2017 [Data set]. Harvard Dataverse.
Licence	CC0 1.0
Source data	https://doi.org/10.7910/DVN/HEYPSQ

Notes

Conjoint table (irw_conjoint). Discrete choice experiment, real and incentivized: 'choose which of the two seeds you would purchase if you were at the market to buy seed. If you wouldn't buy either then choose ninguna' (enumerator script); ninguna = opt-out (both 0). Seed shown only as the plot symbol (circle = certified, square = QDS, triangle = recycled, blind to farmers). Fixed 12-pair design in four display orders. 2 farmers without a choice set and 2 invalid answers dropped. Price barely affects choice.

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

Design

Topic	consumer products
A profile represents	product service
Country	NI
Language shown	es
Language of stored levels	en
Randomization restrictions	yes (stated by the source): fixed orthogonal design of 12 pairs (CHOICE EXPERIMENT DESIGN.tab), the same for every farmer, shown in 4 orders (sets W/X/Y/Z); the two seeds in a pair always differ and the two prices always differ; level shares are those of the 24 fixed alternatives
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	When you are shown each set, we want you to choose which of the two seeds you would purchase if you were at the market to buy seed. If you wouldn't buy either then choose ninguna. [choice, opt-out allowed]

Columns

attr_priceattr_seedchoicecov_bdm_bid_circlecov_bdm_bid_squarecov_bdm_bid_trianglecov_villageidprofiletasktrial_design_row

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("maredia_2020_bean_seed_choice", source = "conj")

# Python
pip install irw

import irw
df = irw.fetch("maredia_2020_bean_seed_choice", source="conj")

How to cite

@misc{https://doi.org/10.7910/dvn/heypsq,
  doi = {10.7910/DVN/HEYPSQ},
  url = {https://dataverse.harvard.edu/citation?persistentId=doi:10.7910/DVN/HEYPSQ},
  author = {Maredia, Mywish K and Posey, Sean and Reyes, Byron and Shupp, Robert},
  keywords = {Agricultural Sciences, Social Sciences, willingness to pay, choice experiment, seed quality, common bean, Nicaragua},
  title = {Farmer Willingness to Pay for Quality Bean Seeds: Data, Tools and Methods Used in the Field Experiments Conducted in Nicaragua, 2017},
  publisher = {Harvard Dataverse},
  year = {2020}
}

Respondents	229
Rows (one per respondent, task and profile)	5,492
Tasks per respondent (most)	12
Profiles per task	2
Attributes	2
Tasks with no profile chosen	403

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

maredia_2020_bean_seed_choice