Moreover, accounting for second order interactions significantly altered the estimates of the implicit prices of attributes compared to the main effects specifications.
The Interior Department is overhauling its method for valuing federal lands, responding to repeated criticisms that its appraisers were under pressure from superiors to alter their estimates of publicly owned property being offered in land exchanges.
Whereas some studies implement sophisticated modeling systems to estimate altered air quality, capturing regional differences in pollutant levels [ 13], others use simple target values with uniform pollution reductions across all spatial areas [ 12].
Future studies should assay additional AIMs to test whether improving the precision of ancestry estimates alters the pattern of findings we report here.
However, as missing data was low in this study (<1% for most variables), the listwise deletion of missing data is unlikely to affect the estimates or alter the conclusions reached.
The company's own report to a group of shareholder activists last March asserted that the price would have to rise to between $150 and $200 a ton — more than ten times its current estimate — to alter fundamental decisions about investing in oil.
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Clearly, for such small quantities of DNA, slight variations in pipetting accuracy and/or DNA concentration estimate might alter the final sensitivity data.
The O3 and PM10 effect estimates from two-pollutant models were similar to the effect estimates from the single-pollutant models, but the NO2 estimates were altered (Additional file 4: Table A).
We additionally evaluated the relations of serum wet-weight concentrations of DDE, DDT, and HCB, without lipid adjustment or lipid standardization, and outcomes, and effect estimates were altered negligibly (data not shown).
