Checks and Balances and Nation Building: The Spanish Constitutional Court and Catalonia

Last registered on May 09, 2022

Pre-Trial

Trial Information

General Information

Title
Checks and Balances and Nation Building: The Spanish Constitutional Court and Catalonia
RCT ID
AEARCTR-0008722
Initial registration date
May 06, 2022

Initial registration date is when the trial was registered.

It corresponds to when the registration was submitted to the Registry to be reviewed for publication.

First published
May 09, 2022, 8:22 PM EDT

First published corresponds to when the trial was first made public on the Registry after being reviewed.

Locations

Region

Primary Investigator

Affiliation
CUNEF Universidad

Other Primary Investigator(s)

PI Affiliation
CUNEF Universidad
PI Affiliation
CUNEF Universidad

Additional Trial Information

Status
In development
Start date
2022-04-20
End date
2022-06-01
Secondary IDs
Prior work
This trial does not extend or rely on any prior RCTs.
Abstract
We examine whether judicial review can affect nation building by studying how the ruling of the Spanish Constitutional Court on the Catalan Constitution affected Catalan support of secession. Using a public opinion survey we previously find that the ruling led to a 20% increase in support for Catalan independence from Spain in 2010. We expand these results by running our own survey which asks similar and new questions. To obtain the effect of the ruling on identity and preferences, we resort to priming techniques. The uploaded pre-analysis plan discusses the outcomes in the survey, the hypothesis to test, the empirical strategy, the experimental design, and power calculations.
External Link(s)

Registration Citation

Citation
Casas, Agustin, Federico Curci and Antoni-Italo De Moragas. 2022. "Checks and Balances and Nation Building: The Spanish Constitutional Court and Catalonia ." AEA RCT Registry. May 09. https://doi.org/10.1257/rct.8722
Sponsors & Partners

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Experimental Details

Interventions

Intervention(s)
Intervention Start Date
2022-05-16
Intervention End Date
2022-05-29

Primary Outcomes

Primary Outcomes (end points)
See pre-analysis plan
Primary Outcomes (explanation)

Secondary Outcomes

Secondary Outcomes (end points)
See pre-analysis plan
Secondary Outcomes (explanation)

Experimental Design

Experimental Design
The randomized experiment will divide survey participants into a control group and a treatment group. The treatment will be conducted using priming techniques. The treatment group will receive four questions about the ruling of the Spanish Constitutional Court on the Catalan Constitution, while the control group will be asked four questions about mobile phone usage.
Experimental Design Details
Randomization Method
Priming
Randomization Unit
Individuals
Was the treatment clustered?
No

Experiment Characteristics

Sample size: planned number of clusters
We perform quota sampling using 16 categories. The quota sampling of our survey is based on sex (2 categories), age (4 categories), province (4 categories), and size of the municipality of residence (6 categories).
Sample size: planned number of observations
3400 observations
Sample size (or number of clusters) by treatment arms
The sample size is equally divided between treatment arms.
Minimum detectable effect size for main outcomes (accounting for sample design and clustering)
For the variable representing whether the respondents prefer more autonomy in the relationship between Catalonia and Spain, the minimum detectable effect size is 0.095. This is obtained assuming a statistical test with 80% power and a level of statistical significance equal to 5%.
Supporting Documents and Materials

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IRB

Institutional Review Boards (IRBs)

IRB Name
Universidad P├║blica de Navarra
IRB Approval Date
2022-02-21
IRB Approval Number
PI-004/22
Analysis Plan

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Post-Trial

Post Trial Information

Study Withdrawal

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Intervention

Is the intervention completed?
No
Data Collection Complete
Data Publication

Data Publication

Is public data available?
No

Program Files

Program Files
Reports, Papers & Other Materials

Relevant Paper(s)

Reports & Other Materials