Conditional and Unconditioanl Elasticties (3SLS/SUR) at Mean Shares
Created via SAS program <model-estimate-AIDS-ver01.sas>

 

Notes on Estimation

Note 1: Includes segment122 (Metadate CD/ER and Ritalin SR/LA cobmined via med-equivalence)
Note 2: Includes segments 503 (Drugs combined via med-equivalence)
Note 3: Fixed Effects: State Level for all segments

-------------------- 3SLS RESULTS --------------------

Share of Each Molecule
MPH MAS DEX OFF-Lables +
0.455 0.281 0.034 0.230

u: Mid-Level Shares (Share of Forms within Molecule)
  MPH-IR MPH-ER MPH-OROS MAS-IR MAS-ER DEX-IR DEX-ER Off-Labels+ (5
Drugs)
ROW1 0.292 0.171 0.537 0.571 0.429 0.323 0.677 1.000

s: Bottom Level Shares (Within Molecule-Form)
  Ritalin Methylin Generics (MPH-IR) Ritalin SRLA Metadate ERCD MethylinER Generics (MPH-ER) Concerta Aderall Generic (MAS-IR) Aderall XR Dexederine Dextrostat Generics (DEX-IR) Dexederine SR Generics (DEX-ER) Offlabels
ROW1 0.251 0.208 0.541 0.294 0.297 0.098 0.311 1.000 0.564 0.436 1.000 0.531 0.083 0.385 0.589 0.411 1.000

Absolute Shares of Each Drug
  Ritalin Methylin Generics (MPH-IR) Ritalin SRLA Metadate ERCD MethylinER Generics (MPH-ER) Concerta Aderall Generic (MAS-IR) Aderall XR Dexederine Dextrostat Generics (DEX-IR) Dexederine SR Generics (DEX-ER) Offlabels
ROW1 0.033 0.028 0.072 0.023 0.023 0.008 0.024 0.244 0.090 0.070 0.120 0.006 0.001 0.004 0.013 0.009 0.230

Unconditional Marshallian Elasticities
  Ritalin Methylin Generics (MPH-IR) Ritalin SRLA Metadate ERCD MethylinER Generics (MPH-ER) Concerta Aderall Generic (MAS-IR) Aderall XR Dexederine Dextrostat Generics (DEX-IR) Dexederine SR Generics (DEX-ER) Offlabels
Ritalin -1.263 0.139 0.403 -0.258 -0.260 -0.086 -0.273 0.948 0.007 0.006 0.010 -0.066 -0.010 -0.048 -0.154 -0.108 -0.250
Methylin 0.258 -0.347 -0.277 -0.131 -0.132 -0.044 -0.139 0.482 0.004 0.003 0.005 -0.034 -0.005 -0.024 -0.078 -0.055 -0.127
Generics (MPH-IR) 0.242 -0.135 -0.611 -0.180 -0.182 -0.060 -0.191 0.663 0.005 0.004 0.007 -0.046 -0.007 -0.034 -0.108 -0.075 -0.175
Ritalin SRLA -0.333 -0.275 -0.718 -2.130 -0.077 0.478 0.061 2.404 0.007 0.005 0.009 -0.060 -0.009 -0.044 -0.140 -0.098 -0.228
Metadate ERCD -0.250 -0.207 -0.539 0.046 -1.316 -0.065 0.083 1.805 0.005 0.004 0.007 -0.045 -0.007 -0.033 -0.105 -0.073 -0.171
MethylinER -0.292 -0.241 -0.630 1.493 -0.259 -1.945 -0.752 2.108 0.006 0.005 0.008 -0.053 -0.008 -0.038 -0.123 -0.086 -0.200
Generics (MPH-ER) -0.249 -0.205 -0.536 0.182 0.082 -0.215 -1.293 1.794 0.005 0.004 0.007 -0.045 -0.007 -0.033 -0.104 -0.073 -0.170
Concerta 0.091 0.075 0.196 0.185 0.187 0.062 0.196 -1.528 0.006 0.005 0.008 -0.055 -0.009 -0.040 -0.127 -0.089 -0.207
Aderall 0.002 0.001 0.004 0.001 0.001 0.000 0.001 0.013 -1.419 0.189 0.149 0.156 0.024 0.113 0.362 0.253 -1.036
Generic (MAS-IR) 0.001 0.001 0.002 0.001 0.001 0.000 0.001 0.006 0.631 -1.176 0.066 0.069 0.011 0.050 0.161 0.112 -0.459
Aderall XR 0.001 0.001 0.003 0.001 0.001 0.000 0.001 0.010 0.069 0.053 -0.990 0.126 0.020 0.091 0.291 0.203 -0.832
Dexederine -0.024 -0.020 -0.051 -0.016 -0.016 -0.005 -0.017 -0.175 0.243 0.188 0.323 -1.608 0.873 0.014 0.154 0.107 -1.261
Dextrostat -0.048 -0.039 -0.102 -0.032 -0.033 -0.011 -0.034 -0.348 0.484 0.374 0.645 5.198 -7.600 0.963 0.306 0.214 -2.516
Generics (DEX-IR) -0.017 -0.014 -0.037 -0.012 -0.012 -0.004 -0.012 -0.125 0.174 0.135 0.232 0.127 0.284 -0.929 0.110 0.077 -0.905
Dexederine SR -0.029 -0.024 -0.062 -0.020 -0.020 -0.007 -0.021 -0.211 0.293 0.227 0.390 0.090 0.014 0.065 -0.967 0.241 -1.523
Generics (DEX-ER) -0.012 -0.010 -0.026 -0.008 -0.008 -0.003 -0.009 -0.089 0.124 0.096 0.165 0.038 0.006 0.028 0.592 -0.898 -0.643
Offlabels 0.030 0.025 0.064 0.020 0.021 0.007 0.022 0.218 -0.242 -0.187 -0.322 -0.127 -0.020 -0.092 -0.293 -0.205 0.011

Conditional Elastcities (Marshallian/Hicksian/H-Allen/Expendiure) & Shares
  Ritalin Methylin Generics (MPH-IR) Ritalin Methylin Generics (MPH-IR) Ritalin Methylin Generics (MPH-IR) Exp Share
Ritalin -1.42 0.01 0.06 -1.08 0.29 0.79 -4.31 1.39 1.47 1.36 0.25
Methylin 0.18 -0.41 -0.45 0.35 -0.27 -0.08 1.39 -1.30 -0.15 0.69 0.21
Generics (MPH-IR) 0.13 -0.23 -0.85 0.37 -0.03 -0.34 1.47 -0.15 -0.62 0.95 0.54

Conditional Elastcities (Marshallian/Hicksian/H-Allen/Expendiure) & Shares
  Ritalin SRLA Metadate ERCD MethylinER Generics (MPH-ER) Ritalin SRLA Metadate ERCD MethylinER Generics (MPH-ER) Ritalin SRLA Metadate ERCD MethylinER Generics (MPH-ER) Exp Share
Ritalin SRLA -1.99 0.06 0.52 0.21 -1.64 0.42 0.64 0.58 -5.58 1.41 6.54 1.86 1.20 0.29
Metadate ERCD 0.15 -1.21 -0.03 0.19 0.41 -0.94 0.06 0.47 1.41 -3.18 0.59 1.52 0.90 0.30
MethylinER 1.61 -0.14 -1.90 -0.62 1.92 0.18 -1.80 -0.30 6.54 0.59 -18.37 -0.95 1.05 0.10
Generics (MPH-ER) 0.29 0.19 -0.18 -1.18 0.55 0.45 -0.09 -0.91 1.86 1.52 -0.95 -2.91 0.89 0.31

Conditional Elastcities (Marshallian/Hicksian/H-Allen/Expendiure) & Shares
  MPH-IR MPH-ER MPH-OROS MPH-IR MPH-ER MPH-OROS MPH-IR MPH-ER MPH-OROS Exp Share
MPH-IR -0.66 -0.72 0.45 -0.39 -0.56 0.95 -1.34 -3.30 1.77 0.93 0.29
MPH-ER -1.24 -1.47 1.75 -0.96 -1.31 2.27 -3.30 -7.66 4.23 0.96 0.17
MPH-OROS 0.21 0.54 -1.80 0.52 0.72 -1.24 1.77 4.23 -2.31 1.05 0.54

Conditional Elastcities (Marshallian/Hicksian/H-Allen/Expendiure) & Shares
  Aderall Generic (MAS-IR) Aderall Generic (MAS-IR) Aderall Generic (MAS-IR) Exp Share
Aderall -1.47 0.15 -0.73 0.73 -1.29 1.66 1.32 0.56
Generic (MAS-IR) 0.61 -1.19 0.94 -0.94 1.66 -2.15 0.59 0.44

Conditional Elastcities (Marshallian/Hicksian/H-Allen/Expendiure) & Shares
  MAS-IR MAS-ER MAS-IR MAS-ER MAS-IR MAS-ER Exp Share
MAS-IR -1.02 0.05 -0.46 0.46 -0.81 1.08 0.97 0.57
MAS-ER 0.03 -1.06 0.62 -0.62 1.08 -1.44 1.03 0.43

Conditional Elastcities (Marshallian/Hicksian/H-Allen/Expendiure) & Shares
  Dexederine Dextrostat Generics (DEX-IR) Dexederine Dextrostat Generics (DEX-IR) Dexederine Dextrostat Generics (DEX-IR) Exp Share
Dexederine -1.77 0.85 -0.10 -1.22 0.93 0.29 -2.30 11.22 0.76 1.03 0.53
Dextrostat 4.87 -7.65 0.73 5.96 -7.48 1.52 11.22 -89.98 3.94 2.05 0.08
Generics (DEX-IR) 0.01 0.27 -1.01 0.40 0.33 -0.73 0.76 3.94 -1.89 0.74 0.39

Conditional Elastcities (Marshallian/Hicksian/H-Allen/Expendiure) & Shares
  Dexederine SR Generics (DEX-ER) Dexederine SR Generics (DEX-ER) Dexederine SR Generics (DEX-ER) Exp Share
Dexederine SR -1.31 -0.00 -0.54 0.54 -0.92 1.31 1.31 0.59
Generics (DEX-ER) 0.45 -1.00 0.77 -0.77 1.31 -1.88 0.55 0.41

Conditional Elastcities (Marshallian/Hicksian/H-Allen/Expendiure) & Shares
  DEX-IR DEX-ER DEX-IR DEX-ER DEX-IR DEX-ER Exp Share
DEX-IR -0.89 -0.15 -0.56 0.56 -1.72 0.82 1.04 0.32
DEX-ER -0.05 -0.93 0.27 -0.27 0.82 -0.39 0.98 0.68

Conditional Elastcities (Marshallian/Hicksian/H-Allen/Expendiure) & Shares
  MPH MAS DEX OFF-Lables + MPH MAS DEX OFF-Lables + MPH MAS DEX OFF-Lables + Exp Share
MPH -0.51 0.02 -0.30 -0.20 -0.06 0.30 -0.27 0.03 -0.13 1.06 -8.00 0.14 1.00 0.45
MAS 0.02 -0.84 0.71 -0.80 0.44 -0.58 0.74 -0.59 0.96 -2.07 21.78 -2.57 0.92 0.28
DEX -0.30 0.71 -0.43 -1.18 0.25 1.05 -0.39 -0.90 0.54 3.73 -11.54 -3.92 1.21 0.03
OFF-Lables + 0.41 -0.75 -0.74 0.01 0.89 -0.45 -0.70 0.26 1.96 -1.61 -20.67 1.12 1.07 0.23

Estimates of the Top Level
Equation
B Gamma
0.41282 -1.153073

-------------------- SUR RESULTS ---------------------

Share of Each Molecule
MPH MAS DEX OFF-Lables +
0.455 0.281 0.034 0.230

u: Mid-Level Shares (Share of Forms within Molecule)
  MPH-IR MPH-ER MPH-OROS MAS-IR MAS-ER DEX-IR DEX-ER Off-Labels+ (5
Drugs)
ROW1 0.292 0.171 0.537 0.571 0.429 0.323 0.677 1.000

s: Bottom Level Shares (Within Molecule-Form)
  Ritalin Methylin Generics (MPH-IR) Ritalin SRLA Metadate ERCD MethylinER Generics (MPH-ER) Concerta Aderall Generic (MAS-IR) Aderall XR Dexederine Dextrostat Generics (DEX-IR) Dexederine SR Generics (DEX-ER) Offlabels
ROW1 0.251 0.208 0.541 0.294 0.297 0.098 0.311 1.000 0.564 0.436 1.000 0.531 0.083 0.385 0.589 0.411 1.000

Absolute Shares of Each Drug
  Ritalin Methylin Generics (MPH-IR) Ritalin SRLA Metadate ERCD MethylinER Generics (MPH-ER) Concerta Aderall Generic (MAS-IR) Aderall XR Dexederine Dextrostat Generics (DEX-IR) Dexederine SR Generics (DEX-ER) Offlabels
ROW1 0.033 0.028 0.072 0.023 0.023 0.008 0.024 0.244 0.090 0.070 0.120 0.006 0.001 0.004 0.013 0.009 0.230

Unconditional Marshallian Elasticities
  Ritalin Methylin Generics (MPH-IR) Ritalin SRLA Metadate ERCD MethylinER Generics (MPH-ER) Concerta Aderall Generic (MAS-IR) Aderall XR Dexederine Dextrostat Generics (DEX-IR) Dexederine SR Generics (DEX-ER) Offlabels
Ritalin -0.761 -0.019 0.212 -0.268 -0.271 -0.089 -0.284 0.833 0.050 0.038 0.066 -0.084 -0.013 -0.061 -0.196 -0.137 -0.273
Methylin 0.047 0.017 -0.354 -0.137 -0.138 -0.046 -0.145 0.425 0.025 0.020 0.034 -0.043 -0.007 -0.031 -0.100 -0.070 -0.139
Generics (MPH-IR) 0.141 -0.159 -0.382 -0.189 -0.191 -0.063 -0.200 0.587 0.035 0.027 0.047 -0.059 -0.009 -0.043 -0.138 -0.096 -0.192
Ritalin SRLA -0.351 -0.290 -0.756 -0.463 -0.074 0.031 -0.021 1.341 0.045 0.035 0.060 -0.076 -0.012 -0.055 -0.176 -0.123 -0.246
Metadate ERCD -0.262 -0.217 -0.565 -0.034 -0.052 -0.204 -0.104 1.002 0.033 0.026 0.045 -0.057 -0.009 -0.041 -0.132 -0.092 -0.184
MethylinER -0.279 -0.230 -0.601 0.123 -0.624 0.830 -0.750 1.066 0.036 0.027 0.047 -0.061 -0.009 -0.044 -0.140 -0.098 -0.196
Generics (MPH-ER) -0.262 -0.216 -0.565 0.019 -0.099 -0.233 -0.081 1.002 0.033 0.026 0.044 -0.057 -0.009 -0.041 -0.132 -0.092 -0.184
Concerta 0.079 0.065 0.171 0.100 0.101 0.033 0.106 -1.200 0.042 0.032 0.055 -0.071 -0.011 -0.051 -0.164 -0.115 -0.229
Aderall 0.012 0.010 0.026 0.008 0.008 0.003 0.009 0.087 -1.276 0.316 0.054 0.097 0.015 0.070 0.224 0.156 -1.052
Generic (MAS-IR) 0.005 0.004 0.012 0.004 0.004 0.001 0.004 0.039 0.706 -1.139 0.024 0.044 0.007 0.032 0.101 0.071 -0.475
Aderall XR 0.009 0.007 0.019 0.006 0.006 0.002 0.006 0.065 0.034 0.027 -0.739 0.072 0.011 0.052 0.168 0.117 -0.788
Dexederine -0.029 -0.024 -0.062 -0.020 -0.020 -0.007 -0.021 -0.212 0.138 0.107 0.184 -0.781 0.997 -0.007 -0.287 -0.201 -0.970
Dextrostat -0.068 -0.056 -0.145 -0.046 -0.047 -0.015 -0.049 -0.494 0.323 0.250 0.430 6.518 -6.428 0.396 -0.671 -0.469 -2.267
Generics (DEX-IR) -0.020 -0.017 -0.044 -0.014 -0.014 -0.005 -0.015 -0.150 0.098 0.076 0.130 -0.042 0.057 0.132 -0.204 -0.142 -0.688
Dexederine SR -0.037 -0.030 -0.079 -0.025 -0.025 -0.008 -0.027 -0.269 0.176 0.136 0.234 -0.159 -0.025 -0.115 0.111 -0.168 -1.233
Generics (DEX-ER) -0.017 -0.014 -0.036 -0.011 -0.011 -0.004 -0.012 -0.122 0.080 0.062 0.106 -0.072 -0.011 -0.052 -0.223 0.197 -0.559
Offlabels -0.042 -0.034 -0.090 -0.029 -0.029 -0.010 -0.030 -0.306 -0.072 -0.055 -0.095 -0.087 -0.014 -0.063 -0.201 -0.140 0.240

Conditional Elastcities (Marshallian/Hicksian/H-Allen/Expendiure) & Shares
  Ritalin Methylin Generics (MPH-IR) Ritalin Methylin Generics (MPH-IR) Ritalin Methylin Generics (MPH-IR) Exp Share
Ritalin -0.96 -0.18 -0.21 -0.62 0.10 0.52 -2.46 0.48 0.96 1.35 0.25
Methylin -0.05 -0.07 -0.57 0.12 0.08 -0.20 0.48 0.37 -0.36 0.69 0.21
Generics (MPH-IR) 0.00 -0.27 -0.68 0.24 -0.08 -0.17 0.96 -0.36 -0.31 0.95 0.54

Conditional Elastcities (Marshallian/Hicksian/H-Allen/Expendiure) & Shares
  Ritalin SRLA Metadate ERCD MethylinER Generics (MPH-ER) Ritalin SRLA Metadate ERCD MethylinER Generics (MPH-ER) Ritalin SRLA Metadate ERCD MethylinER Generics (MPH-ER) Exp Share
Ritalin SRLA -0.66 -0.28 -0.04 -0.23 -0.31 0.08 0.08 0.14 -1.05 0.28 0.84 0.46 1.21 0.29
Metadate ERCD -0.18 -0.20 -0.25 -0.26 0.08 0.06 -0.17 0.02 0.28 0.22 -1.68 0.06 0.90 0.30
MethylinER -0.04 -0.78 0.78 -0.92 0.25 -0.50 0.87 -0.62 0.84 -1.68 8.89 -1.99 0.96 0.10
Generics (MPH-ER) -0.13 -0.25 -0.28 -0.24 0.13 0.02 -0.19 0.04 0.46 0.06 -1.99 0.13 0.90 0.31

Conditional Elastcities (Marshallian/Hicksian/H-Allen/Expendiure) & Shares
  MPH-IR MPH-ER MPH-OROS MPH-IR MPH-ER MPH-OROS MPH-IR MPH-ER MPH-OROS Exp Share
MPH-IR -0.55 -0.75 0.37 -0.28 -0.59 0.87 -0.96 -3.47 1.62 0.93 0.29
MPH-ER -1.29 -0.51 0.86 -1.01 -0.35 1.37 -3.47 -2.07 2.54 0.94 0.17
MPH-OROS 0.17 0.25 -1.48 0.47 0.43 -0.91 1.62 2.54 -1.69 1.06 0.54

Conditional Elastcities (Marshallian/Hicksian/H-Allen/Expendiure) & Shares
  Aderall Generic (MAS-IR) Aderall Generic (MAS-IR) Aderall Generic (MAS-IR) Exp Share
Aderall -1.48 0.16 -0.73 0.73 -1.30 1.69 1.31 0.56
Generic (MAS-IR) 0.62 -1.21 0.95 -0.95 1.69 -2.18 0.59 0.44

Conditional Elastcities (Marshallian/Hicksian/H-Allen/Expendiure) & Shares
  MAS-IR MAS-ER MAS-IR MAS-ER MAS-IR MAS-ER Exp Share
MAS-IR -0.91 -0.10 -0.34 0.34 -0.59 0.78 1.01 0.57
MAS-ER -0.12 -0.87 0.45 -0.45 0.78 -1.04 0.99 0.43

Conditional Elastcities (Marshallian/Hicksian/H-Allen/Expendiure) & Shares
  Dexederine Dextrostat Generics (DEX-IR) Dexederine Dextrostat Generics (DEX-IR) Dexederine Dextrostat Generics (DEX-IR) Exp Share
Dexederine -1.42 0.90 -0.47 -0.89 0.98 -0.09 -1.68 11.78 -0.23 1.00 0.53
Dextrostat 5.02 -6.66 -0.69 6.26 -6.47 0.21 11.78 -77.81 0.54 2.34 0.08
Generics (DEX-IR) -0.50 -0.01 -0.20 -0.12 0.05 0.08 -0.23 0.54 0.20 0.71 0.39

Conditional Elastcities (Marshallian/Hicksian/H-Allen/Expendiure) & Shares
  Dexederine SR Generics (DEX-ER) Dexederine SR Generics (DEX-ER) Dexederine SR Generics (DEX-ER) Exp Share
Dexederine SR -0.61 -0.68 0.14 -0.14 0.25 -0.35 1.29 0.59
Generics (DEX-ER) -0.55 -0.03 -0.21 0.21 -0.35 0.50 0.59 0.41

Conditional Elastcities (Marshallian/Hicksian/H-Allen/Expendiure) & Shares
  DEX-IR DEX-ER DEX-IR DEX-ER DEX-IR DEX-ER Exp Share
DEX-IR -0.03 -0.98 0.30 -0.30 0.92 -0.44 1.01 0.32
DEX-ER -0.46 -0.53 -0.14 0.14 -0.44 0.21 1.00 0.68

Conditional Elastcities (Marshallian/Hicksian/H-Allen/Expendiure) & Shares
  MPH MAS DEX OFF-Lables + MPH MAS DEX OFF-Lables + MPH MAS DEX OFF-Lables + Exp Share
MPH -0.51 0.12 -0.39 -0.22 -0.06 0.40 -0.36 0.01 -0.13 1.43 -10.51 0.06 1.00 0.45
MAS 0.12 -0.68 0.42 -0.80 0.55 -0.42 0.46 -0.58 1.20 -1.50 13.47 -2.52 0.93 0.28
DEX -0.39 0.42 -0.28 -0.96 0.16 0.76 -0.24 -0.68 0.35 2.72 -6.97 -2.96 1.20 0.03
OFF-Lables + -0.57 -0.22 -0.50 0.24 -0.09 0.07 -0.47 0.48 -0.19 0.26 -13.83 2.10 1.06 0.23

Estimates of the Top Level
Equation
B Gamma
0.4028419 -0.741354