The Hidden Cost of Accommodating Crowdfunder Privacy Preferences: A Randomized Field Experiment

Online crowdfunding has received a great deal of attention from entrepreneurs and policymakers as a promising avenue to fostering entrepreneurship and innovation. A notable aspect of this shift from an offline to an online setting is that it brings increased visibility and traceability of transactions. Many crowdfunding platforms therefore provide mechanisms that enable a campaign contributor to conceal his or her identity or contribution amount from peers. We study the impact of these information (privacy) control mechanisms on crowdfunder behavior. Employing a randomized experiment at one of the largest online crowdfunding platforms, we find evidence of both positive (e.g., comfort) and negative (e.g., privacy priming) causal effects. We find that reducing access to information controls induces a net increase in fundraising, yet this outcome results from two competing influences: treatment increases willingness to engage with the platform (a 4.9% increase in the probability of contribution) and simultaneously decreases the average contribution (a $5.81 decline). This decline derives from a publicity effect, wherein contributors respond to a lack of privacy by tempering extreme contributions. We unravel the causal mechanisms that drive the results and discuss the implications of our findings for the design of online platforms.

💡 Research Summary

The paper investigates how privacy‑control mechanisms on a major online crowdfunding platform affect donor behavior. By running a randomized field experiment, the authors compare two interface conditions: (1) a control condition in which contributors can voluntarily hide their identity and contribution amount via a “private” checkbox, and (2) a treatment condition in which this checkbox is removed, effectively denying users any privacy choice during the checkout flow. Random assignment occurs at the visitor level using cookies, and the experiment runs for four weeks, capturing over 120,000 contribution attempts across a wide range of project categories.

The analysis proceeds in two stages. First, a logistic regression estimates the impact of the treatment on the probability of making a contribution. The results show a statistically significant 4.9‑percentage‑point increase in contribution likelihood when the privacy option is unavailable. The authors interpret this as a “comfort effect”: without an explicit privacy decision, users experience reduced cognitive load and lower perceived risk of personal data exposure, making them more willing to engage.

Second, an ordinary least squares regression examines the average contribution size among those who donate. Here the treatment produces a $5.81 reduction in average donation. This decline is attributed to a “publicity effect”: donors, aware that their amount will be visible to peers, temper extreme contributions—both high‑value and low‑value donors shift toward the median. The authors link this behavior to loss‑aversion and social‑norm considerations, suggesting that the prospect of public scrutiny discourages outlier amounts.

To disentangle the “privacy priming” hypothesis—that merely presenting a privacy option draws attention to privacy concerns and can deter participation—the authors supplement the experiment with pre‑ and post‑survey data. Respondents in the control group report a modest increase in perceived privacy risk after seeing the checkbox, and this heightened risk perception correlates positively with a higher likelihood of abandoning the contribution. In contrast, participants in the treatment condition report a slight decrease in privacy worry, reinforcing the observed rise in contribution probability.

Robustness checks include clustered standard errors at the project level, fixed effects for project category and week, and heterogeneity analyses by project success status, target size, and donor’s first‑time status. The treatment effect on contribution probability remains stable across these subsamples, while the reduction in average donation is most pronounced for projects with large target amounts and for donors who have previously contributed large sums.

Overall, the net effect on total funds raised is modestly positive (approximately a 2.3 % increase), driven by the larger number of contributors outweighing the smaller average donation. However, the authors caution that the decline in high‑value contributions could have strategic implications for campaigns that rely on a few “anchor” donors. They suggest platform designers consider differentiated privacy policies—such as offering the privacy toggle only to donors above a certain threshold or providing a less salient privacy cue—to balance the comfort benefit against the publicity cost.

The study’s limitations include its focus on a single platform, potential cultural specificity of privacy attitudes, and the relatively short experimental horizon, which precludes observation of long‑term donor retention or repeat‑donation behavior. Future research directions proposed are cross‑platform comparisons, integration of additional trust‑building mechanisms (e.g., real‑time project updates), and longitudinal tracking of donor satisfaction and subsequent giving.

In sum, the paper provides causal evidence that privacy controls are not a neutral design element; they simultaneously shape donor willingness to participate and the magnitude of their contributions. Effective platform design must therefore manage the psychological priming induced by privacy options while mitigating the adverse publicity effect that arises when donors know their contributions will be fully visible.