The Supporting Healthy Marriage evaluation: Early impacts on low - income 8 families. (relationshipsca.org)
Early impact studies will virtually never provide the «final answer» as to the effectiveness of any given policy, and researchers should explicitly caution against the interpretation of their work as such. (educationnext.org)
[16] These interventions showed early impacts on test scores that faded completely over the next several years. (carnegieknowledgenetwork.org)