SMDP definition
Examples of SMDP in a sentence
Although single-member district plurality (SMDP) is used nationwide for elections to the House of Commons, other electoral systems have been introduced regionally for selecting members of other bodies.
For example, for the 2011 alternative vote referendum, their leader, ▇▇ ▇▇▇▇▇▇▇▇, and others campaigned in favor of AV, while other prominent Labour MPs campaigned for SMDP, despite being the only party to advocate for an AV referendum in their 2010 party manifesto (BBC 2011; White 2011; ▇▇▇▇▇▇▇▇ et al.
This is because simply using multiple electoral systems does not necessarily provide any additional information about the proposed reform: if one has used SMDP, AV, and a two-round runoff system — all majoritarian systems — this does not help one understand PR.
In contrast, the Conservative Party has always been consistent (and unified) in their support for SMDP and against electoral reform for the House of Commons, but state that support in their party manifestos relatively rarely.
They were thwarted by party backbenchers (rank-and-file legislators) who feared SMDP would damage their chances of reelection.
For example, ▇▇▇▇▇▇▇▇ (2008) illustrates how the leadership of the Liberal Democratic Party (LDP) in Japan was prevented from adopting single-member district plurality (SMDP) de- spite evidence that doing so would increase the LDP’s seat share.
Seven electoral systems are used in the UK — the alternative vote (AV),4 closed-list PR, mixed member proportional (MMP; called the additional member system, AMS, in the UK),5 the multiple non-transferable vote (MNTV; also called the block vote),6 SMDP, the single transferable vote (STV), and the supplementary vote (see Table 3.1).