| Understanding and Expanding the Reach of Home Visiting (HV-REACH) Project (NCT06694376) | Mathematica Policy Research, Inc. | 2025-01-01 |
| Head Start REACH: Strengthening Outreach, Recruitment, and Engagement Approaches with Families. (NCT06670664) | Mathematica Policy Research, Inc. | 2024-11-01 |
| Home-Based Child Care Toolkit for Nurturing School-Age Children Study (NCT06329778) | Mathematica Policy Research, Inc. | 2024-03-15 |
| The Home-Based Child Care Toolkit for Nurturing School-Age Children Pilot Study (NCT05730075) | Mathematica Policy Research, Inc. | 2023-03-20 |
| Early Care and Education Leadership Study: Descriptive Study (NCT05258994) | Mathematica Policy Research, Inc. | 2022-03-04 |
| Vermont RETAIN Impact Evaluation (NCT05146362) | Mathematica Policy Research, Inc. | 2022-02-01 |
| Ohio RETAIN Impact Evaluation (NCT05219045) | Mathematica Policy Research, Inc. | 2022-01-19 |
| Head Start REACH: Strengthening Outreach, Recruitment and Engagement Approaches With Families (NCT05145933) | Mathematica Policy Research, Inc. | 2022-01-03 |
| Components Study of REAL Essentials (NCT06112912) | Mathematica Policy Research, Inc. | 2022-01-01 |
| Minnesota RETAIN Impact Evaluation (NCT05146349) | Mathematica Policy Research, Inc. | 2021-12-23 |
| RETAINWORKS Impact Evaluation (NCT05167981) | Mathematica Policy Research, Inc. | 2021-10-22 |
| RETAIN Kentucky Impact Evaluation (NCT05173350) | Mathematica Policy Research, Inc. | 2021-10-18 |
| The 2021-2022 Study of Family and Staff Well-Being in Head Start FACES Programs (NCT06512740) | Mathematica Policy Research, Inc. | 2021-08-30 |
| The 2021-2022 Study of Family and Staff Well-Being in Head Start AIAN FACES Programs (NCT06510218) | Mathematica Policy Research, Inc. | 2021-08-02 |
| Evaluation of the Primary Care First Model (NCT06617533) | Mathematica Policy Research, Inc. | 2021-01-01 |
| Transitional Care Model Evaluation 2020 (NCT04212962) | Mathematica Policy Research, Inc. | 2020-07-07 |
| Assessing Models of Coordinated Services for Low-Income Children and Their Families (NCT04146974) | Mathematica Policy Research, Inc. | 2019-10-01 |
| Head Start Family and Child Experiences Survey (FACES 2019) (NCT03971435) | Mathematica Policy Research, Inc. | 2019-09-02 |
| American Indian and Alaska Native Head Start Family and Child Experiences Survey (AIAN FACES 2019) (NCT04046965) | Mathematica Policy Research, Inc. | 2019-09-01 |
| Study of Coaching Practices in Early Care and Education Settings (NCT03743337) | Mathematica Policy Research, Inc. | 2019-02-01 |
| Professional Development Tools to Improve the Quality of Infant and Toddler Care (NCT03433872) | Mathematica Policy Research, Inc. | 2018-05-01 |
| The Early Head Start Family and Child Experiences Survey (Baby FACES 2018) (NCT04897789) | Mathematica Policy Research, Inc. | 2017-10-01 |