to your HTML Add class="sortable" to any table you'd like to make sortable Click on the headers to sort Thanks to many, many people for contributions and suggestions. Licenced as X11: http://www.kryogenix.org/code/browser/licence.html This basically means: do what you want with it. */ var stIsIE = /*@cc_on!@*/false; sorttable = { init: function() { // quit if this function has already been called if (arguments.callee.done) return; // flag this function so we don't do the same thing twice arguments.callee.done = true; // kill the timer if (_timer) clearInterval(_timer); if (!document.createElement || !document.getElementsByTagName) return; sorttable.DATE_RE = /^(\d\d?)[\/\.-](\d\d?)[\/\.-]((\d\d)?\d\d)$/; forEach(document.getElementsByTagName('table'), function(table) { if (table.className.search(/\bsortable\b/) != -1) { sorttable.makeSortable(table); } }); }, makeSortable: function(table) { if (table.getElementsByTagName('thead').length == 0) { // table doesn't have a tHead. Since it should have, create one and // put the first table row in it. the = document.createElement('thead'); the.appendChild(table.rows[0]); table.insertBefore(the,table.firstChild); } // Safari doesn't support table.tHead, sigh if (table.tHead == null) table.tHead = table.getElementsByTagName('thead')[0]; if (table.tHead.rows.length != 1) return; // can't cope with two header rows // Sorttable v1 put rows with a class of "sortbottom" at the bottom (as // "total" rows, for example). This is B&R, since what you're supposed // to do is put them in a tfoot. So, if there are sortbottom rows, // for backwards compatibility, move them to tfoot (creating it if needed). sortbottomrows = []; for (var i=0; i
In between our slew of ongoing projects, we've also taken time to work with our modified method of applying the Climbing Limo approach to the task of forecasting inflation-adjusted GDP for the U.S. in future quarters. The chart below shows some of the preliminary backtesting we've done to see how well our Modified Limo would have fared against where real GDP really came in at:
The main difference between the two methods is how they're applied. The Climbing Limo method is used to forecast real GDP some three quarters ahead in time, while the Modified Limo is only used to forecast where the final revision of real GDP will be in the next quarter. In the chart above, we find that for the next quarter for which GDP data will be released, 2007-Q3, the Modified Limo forecasts a real GDP level of 11,583.3 billion (2000) USD, while the original Climbing Limo method forecast a real GDP level of 11,530.0 billion (2000) USD. Simply projecting the most recent quarter's growth into the next quarter would put this figure at 11,628.6 billion (2000) USD.
Just for fun, we backtested the Modified Limo method using quarterly real GDP data going back to 1947, comparing the forecast results against what simply projecting the previous quarter's rate of growth into the next quarter. In looking at the absolute error (the absolute difference between forecast and actual results), the Modified Limo method produced the following outcomes:
We'll know how close we were with our Modified Limo forecast when the final revision for 2007-Q3 is released on December 20, 2007. And yes, when we get around to it, there will be a tool!
Labels: gdp forecast
Welcome to the blogosphere's toolchest! Here, unlike other blogs dedicated to analyzing current events, we create easy-to-use, simple tools to do the math related to them so you can get in on the action too! If you would like to learn more about these tools, or if you would like to contribute ideas to develop for this blog, please e-mail us at:
ironman at politicalcalculations
Thanks in advance!
Closing values for previous trading day.
This site is primarily powered by:
The tools on this site are built using JavaScript. If you would like to learn more, one of the best free resources on the web is available at W3Schools.com.