Hello,<div><br></div><div>an other question I wonder if you could help me with:</div><div>For single winner elections we currently use the two round system, which is equivalent to the Contingent vote providing that the voter does not change preferences see <a href="http://en.wikipedia.org/wiki/Two-round_system">http://en.wikipedia.org/wiki/Two-round_system</a> and <a href="http://en.wikipedia.org/wiki/Contingent_vote">http://en.wikipedia.org/wiki/Contingent_vote</a></div>
<div><span class="Apple-style-span" style="font-family: sans-serif; font-size: 13px; border-collapse: collapse; line-height: 19px; -webkit-border-horizontal-spacing: 2px; -webkit-border-vertical-spacing: 2px; "><br></span></div>
<div><a href="http://en.wikipedia.org/wiki/Contingent_vote"></a><span class="Apple-style-span" style="font-family: sans-serif; font-size: 13px; border-collapse: collapse; line-height: 19px; -webkit-border-horizontal-spacing: 2px; -webkit-border-vertical-spacing: 2px; ">According to the table on:</span></div>
<div><a href="http://en.wikipedia.org/wiki/Schulze_method#Comparison_with_other_preferential_single-winner_election_methods">http://en.wikipedia.org/wiki/Schulze_method#Comparison_with_other_preferential_single-winner_election_methods</a>,</div>
<div><span class="Apple-style-span" style="font-family: sans-serif; font-size: 13px; border-collapse: collapse; line-height: 19px; -webkit-border-horizontal-spacing: 2px; -webkit-border-vertical-spacing: 2px; "><a href="http://en.wikipedia.org/wiki/Sri_Lankan_contingent_vote" title="Sri Lankan contingent vote" class="mw-redirect" style="text-decoration: none; background-image: none; background-attachment: initial; background-origin: initial; background-clip: initial; background-color: initial; "><font class="Apple-style-span" color="#000000">Contingent voting</font></a></span> has no advantage over Schulze method (apart from being a few dimensions simpler in terms of vote count and understandability for the common person).</div>
<div>Two-round voting (although widely used) is not listed in the table.</div><div><br></div><div>The questions are: </div><div>1) Does the two-round system<span class="Apple-style-span" style="font-family: sans-serif; font-size: 13px; border-collapse: collapse; line-height: 19px; -webkit-border-horizontal-spacing: 2px; -webkit-border-vertical-spacing: 2px; "> satisfy any criteria, which Schulze method fails, apart from complexity and understandability and the option to change preferences between election rounds?</span></div>
<div><span class="Apple-style-span" style="font-family: sans-serif; font-size: 13px; border-collapse: collapse; line-height: 19px; -webkit-border-horizontal-spacing: 2px; -webkit-border-vertical-spacing: 2px; ">2) What criteria does the two-round system satisfy that the Contingent vote does not satisfy and vice versa?</span></div>
<div><span class="Apple-style-span" style="font-family: sans-serif; font-size: 13px; border-collapse: collapse; line-height: 19px; -webkit-border-horizontal-spacing: 2px; -webkit-border-vertical-spacing: 2px; "><br></span></div>
<div><span class="Apple-style-span" style="font-family: sans-serif; font-size: 13px; border-collapse: collapse; line-height: 19px; -webkit-border-horizontal-spacing: 2px; -webkit-border-vertical-spacing: 2px; ">Best regards</span></div>
<div><span class="Apple-style-span" style="font-family: sans-serif; font-size: 13px; border-collapse: collapse; line-height: 19px; -webkit-border-horizontal-spacing: 2px; -webkit-border-vertical-spacing: 2px; ">Peter Zborník</span></div>