Evidence map›Paper›PMID 33187765›Full record

ArticleVaccine2020

The demand for a COVID-19 vaccine in Ecuador.

Oscar Sarasty, Carlos E Carpio, Darren Hudson, Patricia A Guerrero-Ochoa, Ivan Borja

Open access · greenAbstract read
In one paragraph

Article in Vaccine, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 91 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
91citing papers in PubMed, 2 pooled it
17.1field-weighted citation impact, top 1% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

91 citing papers in PubMed, 2 syntheses or guidelines pooled it, 156 citations in OpenAlex.

  1. Determinants of willingness to pay for health services: a systematic review of contingent valuation studies.The European journal of health economics : HEPAC : health economics in prevention and care · 2022
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31 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

5 authors at 3 institutions in 3 countries.

Oscar SarastyDepartment of Agricultural and Applied Economics, Texas Tech University, Lubbock, TX 79409-2132, USA.
Carlos E CarpioDepartment of Agricultural and Applied Economics, Texas Tech University, Lubbock, TX 79409-2132, USA. Electronic address: carlos.carpio@ttu.edu.
Darren HudsonDepartment of Agricultural and Applied Economics, Texas Tech University, Lubbock, TX 79409-2132, USA.
Patricia A Guerrero-OchoaDepartament of Biochemistry, Faculty of Science, University of Zaragoza, Zaragoza 50009, Spain.
Ivan BorjaDepartment of Business Administration, Ana G. Mendez University, San Juan 00926, PR, USA.
Texas Tech University · USAna G. Mendez University System · PRUniversidad de Zaragoza · ES

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

In Latin America, the country of Ecuador was one of the first and most severely affected by the COVID-19 pandemic. This study aimed to evaluate the demand for a COVID-19 vaccine in Ecuador by estimating individuals' willingness to pay (WTP) for the vaccine, and by assessing the effect of vaccine attributes (duration of protection and efficacy) and individuals' characteristics on this valuation. The sample used (N = 1,050) was obtained through an online survey conducted from April 2 to April 7, 2020. Two levels of vaccine efficacy (70% and 98%) and two levels of vaccine duration of protection (1 and 20 years) were considered. The willingness to pay estimates were obtained using a double-bounded dichotomous-choice contingent valuation format. Survey results show that a very large proportion of individuals (at least 97%) were willing to accept a COVID-19 vaccine, and at least 85% of individuals were willing to pay a positive amount for that vaccine. Conservative estimates of the average WTP values ranged from USD 147.61 to 196.65 and the median WTP from USD 76.9 to 102.5. Only the duration of protection was found to influence individuals' WTP for the vaccine (p < 0.01). On average, respondents were willing to pay 30% more for a COVID-19 vaccine with 20 years of protection relative to the vaccine with 1 year of protection. Regression results show that WTP for the vaccine was associated with income, employment status, the perceived probability of needing hospitalization if contracting the virus causing COVID-19, and region of residence.

Indexed as

AdultCOVID-19COVID-19 VaccinesEcuadorFemaleHumansMalePandemicsSARS-CoV-2Surveys and QuestionnairesVaccinationCOVID-19 VaccinesCOVID-19Demand for vaccinesDuration of protectionEfficacySARS-C0V-2Vaccine acceptance

Identifiers

PMID33187765
PMCPMC7832521
OpenAlexW3097340710

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.