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  1. Comments and Opinion |

  2. Correspondence |

  3. Comments and Opinion |

  4. Comments and Opinion |

  5. Comments and Opinion |

  6. Comments and Opinion |

  7. Comments and Opinion |

  8. Comments and Opinion |

  9. Comments and Opinion |

  10. Comments and Opinion |

  11. Comments and Opinion |

  12. Comments and Opinion |

  13. Comments and Opinion |

  14. Comments and Opinion |

    • ...and technological innovation? Historian Daniel Sarewitz and economist Richard Nelson say...
  15. Comments and Opinion |

  16. Comments and Opinion |

  17. Comments and Opinion |

  18. Comments and Opinion |

  19. Comments and Opinion |

  20. Comments and Opinion |

  21. Comments and Opinion |

  22. Comments and Opinion |