8,517 research outputs found
Personal Papers (MS 80-0002)
No full textLetter from Harris Leon Kempner to John Perry Miller regarding contract negotiations
Structural studies on high oxidation state nickel complexes and their nickel (II) precursors using EXAFS spectroscopy
No full textOctahedral nickel(III) complexes [Ni(L-L)3]X3 (L-L = diamine; X = Cl, Br) have been prepared by oxidation of the corresponding nickel(II) species with halogen in carbon tetrachloride under anhydrous conditions. The structures of the more stable products and all the precursors where investigated using nickel K-edge EXAFS spectroscopy and their Ni-N and Ni..Cbackbone interatomic distances were determined. The ability of this technique to detect substituents beyond the second coordination sphere was also investigated. Tetragonal nickel(III) complexes (Ni(L-L)2X20D (L-L = diamine, N-methyl substituted diamine; X = Cl, Br) have also been synthesised by halogen oxidation of the appropriate nickel(II) precursors. The structures of the starting materials were probed using nickel and bromine K-edge EXAFS data, and these were shown to have either a trans or a cis geometry, depending upon the degree of N-methyl substitution and the presence of aquo ligands. The more stable oxidation products have also been structurally characterized. Octahedral nickel(II), F4-diars and diphos have been prepared and their structures elucidated using a combination of nickel, bromine and arsenic K-edge EXAFS data. The interatomic distances obtained for [Ni(F4-diars)2Br2]BF4 have been compared with those determined by X-ray crystallography and were found to be in excellent agreement. Some Class II mixed-valence nickel(II)/(IV) linear chain complexes have been prepared and a structure re-investigated using XAS. The preliminary findings of a model study for these systems using some platinum and mixed-metal analogues are reported.</p
George Perry, John C. Stennis, Dr. and Mrs. William L. Giles
No full textFrom left to right, George Perry, Senator John C. Stennis, and Dr. and Mrs. William L. Giles are pictured standing behind a podium during a receptionhttps://scholarsjunction.msstate.edu/ua-photo-collection/4364/thumbnail.jp
Analyzing Social Experiments as Implemented: A Reexamination of the Evidence from the HighScope Perry Preschool Program
No full textSocial experiments are powerful sources of information about the effectiveness of interventions. In practice, initial randomization plans are almost always compromised. Multiple hypotheses are frequently tested. "Significant" effects are often reported with p-values that do not account for preliminary screening from a large candidate pool of possible effects. This paper develops tools for analyzing data from experiments as they are actually implemented. We apply these tools to analyze the influential HighScope Perry Preschool Program. The Perry program was a social experiment that provided preschool education and home visits to disadvantaged children during their preschool years. It was evaluated by the method of random assignment. Both treatments and controls have been followed from age 3 through age 40. Previous analyses of the Perry data assume that the planned randomization protocol was implemented. In fact, as in many social experiments, the intended randomization protocol was compromised. Accounting for compromised randomization, multiple-hypothesis testing, and small sample sizes, we find statistically significant and economically important program effects for both males and females. We also examine the representativeness of the Perry study.social experiment, compromised randomization, early childhood intervention, multiple-hypothesis testing
Analyzing social experiments as implemented: evidence from the HighScope Perry Preschool Program
No full textSocial experiments are powerful sources of information about the effectiveness of interventions. In practice, initial randomization plans are almost always compromised. Multiple hypotheses are frequently tested. "Significant" effects are often reported with p-values that do not account for preliminary screening from a large candidate pool of possible effects. This paper develops tools for analyzing data from experiments as they are actually implemented. We apply these tools to analyze the influential HighScope Perry Preschool Program. The Perry program was a social experiment that provided preschool education and home visits to disadvantaged children during their preschool years. It was evaluated by the method of random assignment. Both treatments and controls have been followed from age 3 through age 40. Previous analyses of the Perry data assume that the planned randomization protocol was implemented. In fact, as in many social experiments, the intended randomization protocol was compromised. Accounting for compromised randomization, multiple-hypothesis testing, and small sample sizes, we find statistically significant and economically important program effects for both males and females. We also examine the representativeness of the Perry study. Download appendix
Analyzing Social Experiments as Implemented: A Reexamination of the Evidence From the HighScope Perry Preschool Program
No full textSocial experiments are powerful sources of information about the effectiveness of interventions. In practice, initial randomization plans are almost always compromised. Multiple hypotheses are frequently tested. "Significant" effects are often reported with p-values that do not account for preliminary screening from a large candidate pool of possible effects. This paper develops tools for analyzing data from experiments as they are actually implemented. We apply these tools to analyze the influential HighScope Perry Preschool Program. The Perry program was a social experiment that provided preschool education and home visits to disadvantaged children during their preschool years. It was evaluated by the method of random assignment. Both treatments and controls have been followed from age 3 through age 40. Previous analyses of the Perry data assume that the planned randomization protocol was implemented. In fact, as in many social experiments, the intended randomization protocol was compromised. Accounting for compromised randomization, multiple-hypothesis testing, and small sample sizes, we find statistically significant and economically important program effects for both males and females. We also examine the representativeness of the Perry study.
Princess Joy L. Perry
No full textPublicity photo submitted by author/presenter for ODU\u27s Annual Literary Festival 2025.https://digitalcommons.odu.edu/litfest_images/1010/thumbnail.jp
Analyzing Social Experiments as Implemented: A Reexamination of the Evidence From the HighScope Perry Preschool Program
No full textSocial experiments are powerful sources of information about the effectiveness of interventions. In practice, initial randomization plans are almost always compromised. Multiple hypotheses are frequently tested. "Signicant" effects are often reported with p-values that do not account for preliminary screening from a large candidate pool of possible effects. This paper develops tools for analyzing data from experiments as they are actually implemented. We apply these tools to analyze the influential HighScope Perry Preschool Program. The Perry program was a social experiment that provided preschool education and home visits to disadvantaged children during their preschool years. It was evaluated by the method of random assignment. Both treatments and controls have been followed from age 3 through age 40. Previous analyses of the Perry data assume that the planned randomization protocol was implemented. In fact, as in many social experiments, the intended randomization protocol was compromised. Accounting for compromised randomization, multiple-hypothesis testing, and small sample sizes, we find statistically significant and economically important program effects for both males and females. We also examine the representativeness of the Perry study.early childhood intervention; compromised randomization; social experiment; multiple-hypothesis testing
Leone Perry
No full textLeone Perry is pictured her school year at Roosevelt High School. She is the daughter of John L. and Hannah Elizabeth Perry of Montwell, Utah. She married Samuel S. Rey. She was born May 23, 1924 and died December 19, 1985
Perry, OK
No full textPhotograph of "First City Officers of Perry taken November 1, ?" - Partial listing, L to R: 1. Davis 2. Heck Thomas 3. Wharton 4. Drake 5. Jacobs 6. John Dulany 7. Weiderman 8. Ted Hill 9. Mayes ? 10. Bill Tilghman 11. Flock 12. McKinnis 13. Friend 14. Cutter in Perry, OK
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