Experimental Design
We collaborate with a leading hospital in China to conduct a field experiment, involving high-risk pregnancy women participating in the Multi-discipline Treatment (MDT) and their companions (if any). Using a between-subject design, we vary the content and recipient of information at the family level, including pregnant women and their companions, across treatments before MDT. In the control group, both subjects in the family receive basic introduction about the hospital and MDT. In the treatment groups, pregnant women receive additional disease information related to them in Disease group or both disease information and emotional support in Emotion group. In Family group, pregnant women receive the same information as in Emotion group, while companions also receive additional disease and emotional information. To ensure exposure to the information, we send extra information based on assigned treatments every two weeks, for a total of four times after MDT. Moreover, we use a baseline survey to measure the degree of risk aversion, ambiguity aversion, rationality score of both subjects in the family, as well as the coordination level between them before the information intervention. Following each information distribution after MDT, we attach a survey to elicit subjects’ risk perception, emotion, and their coordination level to examine the potential mechanisms of our intervention.