Zhang et al. (Stat Sinica 18:1689–1705, <CitationRef CitationID="CR15">2008</CitationRef>) introduced an aliased effect-number pattern for two-level regular designs and proposed a general minimum lower-order confounding (GMC) criterion for choosing optimal designs. All the GMC <InlineEquation ID="IEq7"> <EquationSource Format="TEX">$$2^{n-m}$$</EquationSource> <EquationSource Format="MATHML"> <math xmlns:xlink="http://www.w3.org/1999/xlink"> <msup> <mn>2</mn> <mrow> <mi>n</mi> <mo>-</mo> <mi>m</mi> </mrow> </msup> </math> </EquationSource> </InlineEquation> designs with <InlineEquation ID="IEq8"> <EquationSource Format="TEX">$$N/4+1\le n\le...</equationsource></inlineequation></equationsource></equationsource></inlineequation></citationref>

The utility of sanctions as a tool of foreign policy is most often marred by controversies, misinterpretations and misrepresentation. Underlining the debate is the question of functionality, efficacy and effectiveness which creates a limbo among scholars and policy makers. This predicament has...

This article studies the semifoldover designs when initial designs are blocked regular designs. The properties and the structures of semifoldover blocked designs are investigated. Optimal blocking and semifoldover plans are tabulated for 16 and 32 run designs.