coincident

Royer Labs SF12 Stereo Coincident Ribbon Microphone
$2,895.00
The Royer/Speiden SF-12 stereo coincident ribbon microphone is one of the finest devices of its kind, combining high quality audio performance with outstanding stereo separation and imaging. It is a modern ribbon design with no audible diffraction effects or cavity resonance. An SF-12 is actually two matched microphones placed one above the other, each aimed 45 degrees from center. The frequency response is excellent regardless of the angle of sound striking the ribbons and off-axis coloration is negligible. The SF-12's extension cable comes with a Y adapter that splits into separate 3-pin male XLR connectors. The two connectors are labeled "Upper" and "Lower" for the upper and lower capsules of the microphone (when held vertically).The two 1.8-micron ribbons are of pure aluminum (99.99%), each weighing approximately 1/3 milligram and producing superb transient response. The magnet/pole piece structure allows a wide uniform frequency range with no substantial peaks or dips. The case is ingot iron and forms part of the magnetic return circuit, an effective system with low leakage flux which accounts for the relatively high sensitivity in a trim package.Warranty

Dared MP-2A3C Tube SET Integrated Amplifier
$1,200.00
This amp re-produces pure SET sound from your music source as a reference amp guide you to critical listening: Naturalness, holographic imaging, presence, depth, deep bass, high resolution, midrange purity, atmosphere, transparency, dynamic contrast, rhythm and pace.

Dared VP-845 tube SET Integrated amplifier
$3,600.00
It is 83-lb (91 lb with the boxes) 845 SET amp with top panel of 5-20 mm thick solid copper-steel alloy. It is designed for human ears, not for testing equipment. The 60 lb hand made HQ transformers to power your high-end speakers for ultimate demonstration on pure SET sound for: naturalness, holographic imaging, presence, depth, deep bass, high resolution, midrange purity, atmosphre, transparency, dynamic contrast, rhythm and pace.

The missing link: using the NBER recession indicator to construct coincident and leading indices of economic activity [An article from: Journal of Econometrics]
$10.95
This digital document is a journal article from Journal of Econometrics, published by Elsevier in 2006. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.

Description:
We use the information content in the decisions of the NBER Business Cycle Dating Committee to construct coincident and leading indices of economic activity for the United States. We identify the coincident index by assuming that the coincident variables have a common cycle with the unobserved state of the economy, and that the NBER business cycle dates signify the turning points in the unobserved state. This model allows us to estimate our coincident index as a linear combination of the coincident series. We compare the performance of our index with other currently popular coincident indices of economic activity.