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Dummy VariablesStock bubble, housing bubble, bailout this, bailout that, Iraq, Afghanistan, Bin Laden, ... and you've been waitin' for these babies! With so many unforeseeable events there has been something of a run on dummy variables, but we located a completely unused supply under a retreating ice sheet in Antarctica. Place your order and share in our good fortune!
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Degrees of FreedomAh, sweet freedom! Who wouldn't welcome a few more degrees of freedom? Some of our users report significant results from purchasing even modest numbers to supplement their original. So spread your wings and fly with these popular items.
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Eigenvalues and Left and right EigenvectorsLeft, right, middle, we can fill any need. These characters provide stability where no other alternatives exist. Our Eigens are up to the task of rotating bodies, vibrating systems, and can even smooth small oscillations. Try some soon!
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ElasticitiesPrice elasticities, cross-price elasticities, supply, demand, you name it, we've got it! Searching for an elusive equilibrium? A nice set of these and you'll be converging in no time!
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DeltasEven econometrics requires fuel inputs. And, baby, its change that drives economists' stuff!
We say, why drive all around to find your good clean deltas that get you a full unit change when you really need one? Buy 'em by the gallon from us!
Our suppliers at Penn State are sitting in front of six acres of full Delta storage tanks . Yep, they've got deltas galore, each guaranteed to give one quick unit of change that is linear and homogeneous throughout its entire range.
Big change? Small change? These deltas work everywhere to give you the performance you need. Buy these deltas to hedge against constants that seem to creep in to slow down everything.
Price? Hey, why talk price when you need quantity? Make us an offer. Hey, it's a market. Let's haggle!
Sorry, no volume discounts available. After all, a unit change is, well, a unit change.
Essential Tools!
Dummy variablesPropensities
Error terms
Elasticities
Coefficients
Chi-squared
Macro variables
Weights matrices
Idempotent matrices
Eigenvalues and vectors
Hessians and Jacobians
Kroenecker products
Degrees of freedom
Interaction terms
t-statistics
Deltas
R-squared
Multipliers
Identity matrices
Data to support results
Grammian Matrices