Individualized Text Messages about Public Services Fail to Sway Voters: Evidence from a Field Experiment on Ugandan Elections

Abstract Mobile communication technologies can provide citizens access to information that is tailored to their specific circumstances. Such technologies may therefore increase citizens’ ability to vote in line with their interests and hold politicians accountable. In a large-scale randomized controlled trial in Uganda (n = 16,083), we investigated whether citizens who receive private, timely, and individualized text messages by mobile phone about public services in their community punished or rewarded incumbents in local elections in line with the information. Respondents claimed to find the messages valuable and there is evidence that they briefly updated their beliefs based on the messages; however, the treatment did not cause increased votes for incumbents where public services were better than expected nor decreased votes where public services were worse than anticipated. The considerable knowledge gaps among citizens identified in this study indicate potential for communication technologies to effectively share civic information. Yet the findings imply that when the attribution of public service outcomes is difficult, even individualized information is unlikely to affect voting behavior.


Introduction
The rapid spread of mobile phones in low-income countries enables users to gain new information directly relevant to their well-being, including prevailing prices at markets, opportunities for employment, and business ideas. Indeed, there is good evidence that gaining access to a mobile phone can be an important catalyst for improved livelihoods (Dammert, Galdo and Galdo, 2014). Yet there are fewer indications about whether mobile phones can help people overcome the political barriers that keep them in poverty.
Several studies have investigated interventions and circumstances that promote information sharing from citizens to public officials using mobile phones (Ferrali et al., 2020;Grossman, Humphreys and Sacramone-Lutz, 2014;Grossman, Humphreys and Sacramone-Lutz, 2020;Buntaine, Nielson and Skaggs, 2019). However, the available evidence does not indicate that this kind of information sharing causes meaningful changes in the provision of public services (Grossman, Platas and Rodden, 2018;Buntaine, Hunnicutt and Komakech, 2020).
Fewer studies have tested whether good-governance organizations can use mobile phones to provide information to voters so that their choices at the polls align with the programmatic performance of politicians, which would give politicians incentives to deliver good public services. Buntaine et al. (2018) report that sending text messages by mobile phone about corruption in district governments caused Ugandan voters to condition their votes on the information for the lower office of district councillor but not for the higher office of district chair. Aker, Collier and Vicente (2017) report that a civic campaign conducted partly by mobile phone increased turnout in Mozambique, but did not decrease electoral irregularities. Yet neither of these interventions leveraged the full potential of mobile phones to tailor information to the preferences and circumstances of each individual voter. In contrast to other ways voters receive information, such as radio, television, or newspaper, mobile phones might contribute to electoral accountability by providing voters with information that is individualized to voters' interests and contexts.
We investigate whether individualized messages about the comparative quality of public services that individual voters deemed most important changed those voters' choices in local Ugandan elections. Prior to the 2016 district (LC5) and sub-county (LC3) elections, local enumerators performed audits of primary schools, roads, health care, and water access in 762 Ugandan villages in a nationwide, area probability sample. 1 We completed a baseline survey with 16,083 Ugandan citizens with mobile phones in the same villages and asked each respondent which of these four public services was most important in determining their vote for local officials.
We collaborated with a non-governmental organization in Uganda to send factual messages about these public services to voters prior to local elections. The density of these treatments was intentionally kept low to minimize the probability of influencing the aggregate outcome of any election and the voters receiving the messages provided individual informed consent. We individualized the messages in several ways. First, we shared information about the public service that each participant stated was most important when deciding how to vote. Second, we localized the information by conducting and sharing audits from each respondent's village. Third, we contextualized the information by sharing how service quality in the respondent's village compared to that in other villages in the district. Finally, we made the information personal by referring to the respondents by their first name and by using their preferred local language. 1 Audits on schools were completed by our partner NGO, Twaweza.
We predicted and preregistered that individualizing information would be an effective strategy for improving electoral accountability. Yet, while most citizens found the messages useful and there is some evidence that treated voters updated their beliefs about the comparative quality of public services, the text messages did not significantly alter voters' choices for district or sub-county offices. Good news indicating that the quality of the selected local servicewhether it be roads, health clinics, water access, or primary schoolswas better than expected did not significantly increase votes for incumbent district or sub-county councillors or chairs. Bad news that the chosen service was worse than expected did not significantly decrease support for incumbents. These null results are precisely estimated and robust to numerous alternative specifications and data subsets.
The findings cast further doubt on the potential for informational campaigns to promote electoral accountability Dunning et al. 2019), especially where voters struggle to attribute credit or blame. As in many decentralized environments, responsibility for Ugandan public services is shared between multiple layers of government (Martin and Raffler, 2021). This makes inferring responsibility for public service outcomes challenging for voters. 2 Additionally, while we find evidence of belief updating after district elections, these effects do not persist after we sent additional messages prior to sub-county elections, reflecting the difficulty of durably shifting political beliefs. The results highlight the many challenges citizens face in sanctioning politicians for poor public services or rewarding them for good public services in low information, decentralized environments.

Research expectations
Information about public performance and public goods appears to affect voting behavior when information is salient and attributable to individual politicians. Public audits of local government officials released before elections in Brazil significantly reduced the probability of reelection for politicians who engage in above-average corruption (Ferraz and Finan, 2008). Report cards on politician performance in India's slums induced higher turnout and higher vote shares for incumbents who were rated favorably on public spending (Banerjee, Kumar, Pande and Su, 2010). A civic information campaign in Mali, which included information about politician performance, appeared to increase programmatic voting (Gottlieb, 2016).
However, in many contexts, sending voters information about the performance of their incumbent politicians does not seem to influence voting behavior on average. Humphreys and Weinstein (2013), for instance, found no impact of scorecards on voter choices in Uganda's national parliamentary elections or on parliamentarians' actions. Transparency about politician performance can even work against public accountability by inducing incumbents to hide their activity (Malesky, Schuler and Tran, 2012) or discouraging voters from turning out (Chong et al. 2015). Most persuasively, a meta-analysis of six coordinated trials across five 2 As we elaborate in the SI Section 1, responsibility for most services in this study are shared by LC3 and LC5 governments. Additionally, central government bureaucrats retain control over many procurement procedures and budgets. countries found no detectable average effect on vote choice from sending voters information about politician performance prior to elections Dunning et al. 2019). Our study was part of this Metaketa I initiative as an alternative treatment arm. We aimed to offer a contrast with the more common approach of providing similar information to all voters.
In particular, we leverage an insight of Lieberman, Posner and Tsai (2014) that information must be individually important, novel, and different from prior beliefs to change behavior. Using mobile phones enabled our team to deliver information tailored to respondents' circumstances and expressed informational needs. Unlike most existing interventions, we provided information privately about the public service respondents stated was most relevant to their vote choice and analyzed the effects conditional on voters' prior beliefs about politicians' performance. Additionally, rather than informing voters about broad regional or national government performance, we tailored the information to each individual's context. Finally, we made the information timely by sending messages in the days immediately prior to the election.
We hypothesized that providing private, individualized, and timely information would have a number of direct and heterogeneous effects. Specifically, when respondents receive positive information about incumbent politicians' relative performance as compared to their prior beliefs -"good news"they should be more likely to support incumbents and to strengthen beliefs about incumbent integrity and effort. We expected the opposite effects when respondents receive "bad news." We also expected good news to enhance a sense of political efficacy and thus increase turnout and bad news to depress turnout.
We expected the informational treatment to have larger effects when respondents received information very different from their prior beliefs, were more uncertain about the performance of politicians at baseline, or placed greater importance on public services. We also expected respondents who were not part of the same tribe as the incumbent, who received information consistent with their political alignment, and who had not been given gifts prior to the election would be more likely to respond to the messages. We preregistered all these hypotheses in advance of treatment. 3

Context and sample
Uganda is a semi-authoritarian country, with restricted access to information and considerable inequities in public service delivery, poverty, and effective governance (Tripp, 2010;Tumushabe et al. 2010). The treatments targeted the 2016 elections for chairs and councillors in districts (or LC5) and sub-counties (LC3), which are the two most important levels of government for the delivery of basic public services. Elections for these offices are held every 5 years and won with a plurality of votes. Incumbents are not term-limited. Citizens assigned to treatment received text messages on how their preferred local service in their village compared to district 3 The pre-analysis plan and amendments are available at https://osf.io/t4qjx/. averages. Citizens assigned to a placebo condition received text messages about the general importance of public services for well-being. We sent many reinforcing text messages by mobile phone a few days before the February 2016 district elections for chairs and councillors and before the March 2016 sub-county elections for chairs and councillors.
Several features of Uganda's 2016 local elections make them particularly illuminating for understanding the effects of information on voting. First, frequent government interference tends to focus on national elections, allowing more opportunities for citizens to hold officials accountable in local elections. Approximately 85% of local elections were contested by at least two candidates (district chairs in our sample averaged three competitors) (Electoral Commission, 2016). Candidates from seven different political parties and independents contested LC5 chair elections, while candidates from 12 parties and independents contested LC3 chair elections. Most respondents (73%) in our sample expected local elections to be free and fair. Second, unlike more established democracies, citizens in Uganda face large barriers to obtaining accurate information about politics due to government control and repression of public media (Tripp, 2010). As we document, most citizens lack the ability to effectively assess the comparative quality of their public services, and many have misconceptions about the functioning and performance of local governments (Bainomugisha et al., 2015). Due to the relative political openness and large service delivery remit of local councils, these are also elections where effective civic interventions are likely to have a large policy impact. We discuss the context of these elections in more detail in SI Section 1.
We completed baseline surveys with 16,083 subjects from 762 nationally representative villages in 27 of 111 Ugandan districts. Details on the sample can be found in SI Section 2. Because the experiment required that subjects possess mobile phones, the final sample skews more educated and had a larger proportion of males compared to the general population (Afrobarometer, 2015).

Treatment, placebo, and baseline survey
Enumerators conducted independent audits of three local public services in each sampled village: access to improved water sources; road conditions; and the cleanliness, availability of medicines, and wait times at local health facilities. In addition, we collated data from our partner Twaweza's preexisting audit of primary schools, which independently tested student achievement. Focus groups indicated these four services would be especially salient to voters. We provide more details on each audit in the SI Section 4.
From the audits, we created indices of "service quality" normalized by the district. The process produced the treatment, which indicates whether services in each village are "much better," "better," "a little worse," or "much worse" than other villages in the same district. Messages were sent to subjects only for the public service they selected as most important or, when an audit was not available, their second choice (applicable to 22% of respondents, see SI Section 10.2). We intended this treatment to provide subjects evidence about whether politicians were performing well or poorly compared to other villages in the district. This information was novel and valuable for the majority of respondents (see SI Table S4 and Section 10.2).
A baseline survey conducted before treatment collected information on prior beliefs about public services, voting intentions, and the most important public service, as well as background information about the subjects' prior political participation and demographic characteristics (see SI Sections 10.2 and 11.1). We use these baseline data to conduct balance and attrition tests in SI Section 11. We also use these data to test for heterogeneous effects hypothesized in advance. 4 Using complete randomization, we assigned half of all subjects in each village to the public services treatment and the other half to the placebo condition. Over 5 days, treated subjects received two to four messages per day in their native language reporting factual audit information about the comparative quality of the public service that they deemed most important for voting. They were provided a series of messages about the overall score for that service relative to other villages in the district. We also explained whether the responsibility for the public service belonged to the LC3, LC5, or both. Placebo respondents received only general informationin the form of public service announcementsabout the importance of quality public services without any information about the performance of their politicians. Examples of treatment and placebo messages are shown in SI Tables S2 and S3.

Voting and turnout outcomes
To produce measures of vote choice and turnout, local enumerators based at a call center conducted endline surveys following each election. The endline surveys measured (1) votes for district and sub-county council chairpersons and councillors, (2) perceptions and knowledge of the incumbents' performance, (3) vote buying and motivations for voting, (4) engagement with elected officials, and (5) voter turnout.
We used self-reports of voting from the post-election survey, as opposed to actual votes counted at the precinct level, for several reasons. First, for ethical reasons, we desired to avoid affecting aggregate election outcomes. Given large enough treatment effects, random assignment by village may have swung local elections. Second, for analytic precision and to align with the larger meta-analytic study of which this experiment was a part Dunning et al., 2019), we wanted to account for individual-level variables such as prior beliefs and voting intent. Third, treatment assignment at the village level would have considerably reduced statistical power.
The measures of vote choice from our endline survey correlate well with the official returns (see SI 6 and Figure S6). We employed multiple approaches to detect possible misreporting, and we show that responses do not meaningfully differ depending upon whether the respondent was surveyed after the announcement of the election results or whether respondents could consistently describe the polling station. See SI Section 5.

Estimation
As preregistered, we split the sample into two groups based on whether each subject was eligible to receive good or bad news about their preferred public service based 4 Many questions were informed by the Pre-Analysis plan of the Metaketa I project (Dunning et al., 2019). on their prior belief. We then collapse all types of good news and bad news into single-treatment indicators T i or T i , which equals one when the subject i is treated and is part of the relevant subset L or L , respectively, for good or bad news.
Our primary estimating equation is given by Equation 1 (shown for the good news subgroup). In it y ij;t1 indicates whether the subject voted for the incumbent party for the political office j, y ij;t0 indicates whether the subject stated that they intended to vote for the incumbent party during the baseline survey, β is a vector of estimated coefficients, X i is a matrix of prespecified, pretreatment covariates, ν j is a village fixed effect, and ε i is the error term clustered by individual when pooling across offices or sharp null standard errors when not pooling. We test our hypotheses on vote choice only for contested offices with and without an extensive array of pretreatment covariates, which produced substantively similar results. SI Section 12 explains departures from our pre-analysis plan, which do not affect the substantive results reported in the main text:

Results
We first consider four direct effects of treatment in Figure 1: vote choice for the incumbent (panels A and B), beliefs about incumbent integrity (panels C and D), beliefs about incumbent effort (panels E and F), and turnout (panels G and H). We see no consistent evidence that subjects eligible for good news who were treated responded positively on any of these outcomes, nor that subjects eligible for bad news who were treated responded negatively, compared to placebo subjects. The large sample size and its resulting strong statistical power mean that these null results are precisely estimated. A likely explanation for the lack of a treatment effect on vote choice (Figure 1, panels A-B) is that respondents did not update their beliefs about incumbent integrity or effort in response to treatment (Figure 1, panels C-F). We conjecture that voters' challenges in attributing public service outcomes to local politicians may explain why the informational treatment did not affect these outcomes.
And finally, the evidence suggests that neither good news nor bad news significantly affected voter turnout, as shown in panels G and H of Figure 1. The possible exception is the effects of bad news in increasing turnout for district chair, which goes against expectations. However, this result does not retain significance after adjustment for multiple comparisons.
As displayed in Figure 2, preregistered expectations regarding heterogeneous treatment effectsfor large differences in priors, uncertainty, importance of services, politician alignment, tribal identity, and receipt of giftsare likewise not borne out in the results. The only significant exception is that voters not aligned with politicians who are treated with bad news are more likely to turn out (panel H). Figure 2 shows treatment effects within subgroups defined by the prespecified moderator for ease of exposition. The preregistered approach without pooling across offices, which yield the same conclusions, are displayed in SI Figures S9-S12. These results provide more confidence that the treatment did not prompt programmatic voting, since the hypothesized effects are not evident among voters most likely to respond to the treatment.
These precisely estimated null effects are surprising in light of the successful receipt of the messages by a large majority of subjects and a post-election survey with a random sample of subjects that indicated the messages were generally considered valuable (Table S4). Additionally, we see strong evidence that treated subjects expressed beliefs about the comparative quality of public services that were either closer to the audit information ("partial updating") or matching the audit

Figure 1
Direct effects of treatment with good and bad news subgroups. Notes: 95% confidence intervals derived from sharp null standard errors by randomization inference. Sample used for estimation of panels A and B excludes uncontested elections and elections where the incumbent switched parties, which is a modification from the prespecified sample.
information ("perfect updating") following the LC5 election ( Figure 3). Belief updating did not persist after the second wave of treatment messages prior to the LC3 election. These decaying effects over time may indicate that subjects changed their beliefs in response to campaigns in the 2 weeks between surveys. Subjects may also have found the treatment information more salient when they first received it prior

Figure 2
Conditional effects of treatment with good and bad news subgroups. Notes: Estimation pools each outcome across all politicians for each individual, with 95% confidence intervals derived from robust standard errors clustered at the level of the individual, which is the level of pooling results across politician and election types for this figure. Sample used for the estimation of panels A-F and I-L excludes uncontested elections, elections where the incumbent switched parties, and redistricted constituencies.
to the LC5 election compared to when the same information was repeated prior to the LC3 election. Consistent with findings in more developed democracies, these estimates suggest political information delivered during an active campaign may have short-lived effects (Gerber et al., 2011).

Discussion
Our results provide further reason to be cautious about efforts to improve electoral accountability through information provision. The intervention we study was designed to improve on more general, blanket information campaigns that have typically yielded disappointing results on programmatic voting Dunning et al., 2019). We provide well-powered evidence that even when information is novel, timely, individualized, and private, it will not necessarily affect vote choice. Because the information was tailored to individual circumstance and preference, the results of this study provide even stronger evidence than currently exists about the impotence of information campaigns in settings where attribution for outcomes is not clear. One possible explanation for these null results is that voters were uncertain about which politicians are most accountable for the quality of the local public services. Responsibility and financing for many local services are shared across LC3s, LC5s, and civil servants working for the national government (Manyak and Katono, 2011;Martin and Raffler, 2021 Belief updating about public services

Figure 3
Belief updating about the comparative quality of public services. Notes: Estimates with 95% confidence intervals derived from robust standard errors clustered at the district level. Sample includes subjects who were able to receive treatment messages about their priority public service and not reassigned to a different service due to missingness in audits.
blame for public service outcomes. Nevertheless, we do not detect treatment effects among voters who received messages attributing their chosen service to one level of government, as compared to voters who received messages about services attributed to multiple levels of government (see SI Section 9). Our treatment and use of technology are purposefully similar to those being adopted by many good-governance organizations and thus offer practical lessons. First, our results strongly suggest that citizens in Uganda do in fact lack sufficient information to hold politicians accountable for public services (SI Figure S15). Yet they also confirm that providing the information is rarely enough to solve accountability gaps, particularly in decentralized contexts or where long or overlapping accountability chains of resources and responsibilities make attributing outcomes to individual officials difficult Lieberman, Posner and Tsai, 2014;. While our intervention provided brief information about politicians' responsibility for services, future interventions might better pair information about performance for delivering public services with more substantial civic education about politicians' responsibilities, which has been effective elsewhere (Gottlieb, 2016;Adida et al., 2019).
Additionally, our research highlights the importance of understanding citizen beliefs about accountability and attribution as a precursor to effective interventions. While information in our study was novel and individualized, there is no evidence that the treatment caused changes in beliefs about incumbent integrity or effort, even when beliefs about the comparative quality of public services changed. This suggests that good-governance organizations need to better understand not just the institutional structure of public service delivery, but also citizen beliefs about these institutions and the nature of service delivery. Data Availability Statement. The data, code, and any additional materials required to replicate all analyses in this article are available at the Journal of Experimental Political Science Dataverse within the Harvard Dataverse Network, at: doi:10.7910/DVN/VL4UTZ (Jablonski et al., 2021).